Aeromaster on Workhorse Chassis—Body Wiring Manual (03102354-WY00EN)

Body Wiring Manual

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Title: Aeromaster on Workhorse Chassis—Body Wiring Manual

Utilimaster Corporation attempts to provide information that is accurate, complete, and useful. All information contained in this manual is based on the latest product information available at the time of publication. However, because of the Utilimaster policy of continual product improvement, Utilimaster reserves the right to amend the information in this document at any time without prior notice.

This material is confidential and the property of Utilimaster. It is shared with your company for the sole purpose of helping you with the operation of the described equipment.

Utilimaster makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Utilimaster shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Utilimaster expressly disclaims all responsibility and liability for the installation, use, performance, maintenance, and support of third-party products. Customers are advised to make their independent evaluation of such products.

No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Utilimaster.

Utilimaster® and Aeromaster® are registered trademarks of Utilimaster Corporation. All other trademarks are products of their respective companies.

Browse the web site www.utilimaster.com for more information about Utilimaster and its products.

Aeromaster on Workhorse Chassis—Body Wiring Manual 3 Contents

Introduction...... 6 Finding Information...... 7 VIN Number...... 7 Body Serial Number...... 7 Safety Considerations...... 8 General Warnings...... 8 Disconnecting the Battery...... 9 Reporting Safety Defects (U.S. Only)...... 9 More Information...... 10 Utilimaster Quick Reference Parts Guide...... 10 Utilimaster Body on Workhorse Chassis Parts Manual...... 10 Utilimaster Glossary of Terms...... 10 Utilimaster Body Service Manual...... 10 Download Files...... 10 Contact Utilimaster ...... 10 Wiring Diagrams...... 11 1—Wire Color Code and Symbol Key...... 11 2—Connectors...... 12 Cummins ISB4 Diesel Only...... 12 Standard...... 13 3—Harness Layout (Connector Locations)...... 18 4—Power Distribution...... 19 5—Grounding System...... 20 6—Switches...... 21 7—Cargo Lamps...... 22 Standard...... 22 Switch on Dash...... 23 Three-Way Switch...... 24 8—Wiper System...... 25 Standard and Cummins ISB4 Intermittent...... 25 Intermittent Option (Non-Cummins ISB4)...... 26

4 Aeromaster on Workhorse Chassis—Body Wiring Manual 9—Heater Only System...... 27 Cable Controls...... 27 Electronic Controls...... 28 9—HVAC System...... 29 Cable Controls...... 29 Electronic Controls...... 30 10—Chassis Supplied A/C Prep...... 31 11—Front Light Wiring...... 32 With Cummins ISB4 Diesel Engines...... 32 Without Daytime Running Lights...... 33 Daytime Running Lights (Domestic)...... 34 Daytime Running Lights (Canadian)...... 35 12—Rear Light Wiring...... 36 Standard...... 36 Routed through Interior...... 37 Split Taillights...... 38 Split Taillights Routed through Interior...... 39 13—Roof Wiring...... 40 14—Clearance Lights...... 41 15—Panel Lights (HVAC Control Panel)...... 42 16—Stereo System...... 43 17—Door Ajar System...... 44 18—Supplemental High Mount Stop Lamp (SHMSL)...... 45 19—Accessory Outlet (Cigarette Lighter)...... 46 20—Cab Dome Light...... 47 21—Dash Fan...... 48 22—Power Vent...... 49 23—Heated Mirrors...... 50 24—Auxiliary Heater...... 51 25—Spotlight or Strobe Light...... 52 Index...... 53

Aeromaster on Workhorse Chassis—Body Wiring Manual 5 Introduction This manual illustrates electrical wiring diagrams for Aeromaster® walk-in bodies on the P-3 Series Workhorse “strip” chassis (Model Years 1999 and later) and the P-3 Series Chevrolet and GMC “strip” chassis (Model Years built from 1996 through 1998). Whether your truck is based on GMC, Chevrolet, or Workhorse chassis, the majority of information is interchangeable by design and are all referred to as the Model 33.

Some configurations, however, depend on the chassis engine option. The four-cylinder Cummins diesel with electronic fuel injection (ISB4) engine has the most unique wiring variations, which is noted throughout this manual. The four-cylinder Cummins diesel with manual fuel injection (4BT) engine is not specified because it uses the standard wiring configurations. The eighth digit in the VIN Number identifies the engine code (P for the ISB4 or L for the 4BT) but typically the ISB4 engine block is painted black while the 4BT is tan in color. (See also the chart below and the VIN Number section on the next page.)

Workhorse Vehicle Identification Number (VIN) Codes Code Position Definition Character Description R 5.7 V8 W 4.3 V8 Y 6.5 V8 Diesel Naturally Aspirated 8 (of 17) Engine F 6.5 V8 Diesel Turbo L 4.9 4BT Diesel Manual P 4.9 ISB4 Diesel Electronic This manual covers only those components manufactured by or installed by Utilimaster® Corporation. Items such as chassis and drive train components or certain interior options are covered by separate manufacturer-supplied information. Not all options are included in this manual and some part numbers have changed from previous model years.

If your vehicle is equipped with a VACS system, supplementary information is in Vehicle Access Controls System for Utilimaster Walk-In Vans Operation and Service Manual (P/N 03102103). To order that manual, call 800-237-7806 or email [email protected].

All information, specifications, and illustrations contained in this manual are based on the latest product information available at the time of publication. However, because of the Utilimaster policy of continual product improvement, Utilimaster reserves the right to amend the information in this document at any time without prior notice.

6 Aeromaster on Workhorse Chassis—Body Wiring Manual Finding Information The Contents lists sections (and their respective pages) containing wiring diagrams and other information. The Index lists pages on which the indexed topics can be found.

Sheet numbers indicated by last two digits in the drawing number (lower right-hand corner of the drawing when viewed at the normal viewing angle) refer to the engineering drawing page numbers but are not in numerical order. These numbers are not meant to match the manual section or page numbers.

NOTE: If you are using the Adobe Acrobat version of this document printing out pages for detailed study is recommended because of the 90° rotation of the diagrams. Printing individual pages or a range of pages from the Acrobat Reader is easily accomplished by selecting File, Print, and then the desired print range.

VIN Number The chassis 17-digit Vehicle Identification Number (VIN) is the legal identifier for this vehicle and is the number recorded in the license plate registration. The VIN appears on a small metal plate in the front corner of the dash on the driver’s side, and you can read the VIN by looking through the windshield. The VIN is also recorded on the Federal Certification Label.

Body Serial Number VIN Tag The 15-digit Utilimaster Body (or Unit) Serial Number is recorded on the Federal Certification Label. This label is a plastic decal (about 11” long and 2” high) that contains a variety of manufacturing information (including the VIN). This label is near the top of the door frame between the driver’s side window and the quarter-panel window.

You will need the VIN or the Body/Unit Serial Number to order parts and make warranty claims.

Federal Certification Label

Aeromaster on Workhorse Chassis—Body Wiring Manual 7 Safety Considerations General Warnings The following list contains some general WARNINGS that you should follow when you work on a vehicle. • Be sure that the ignition switch is always in the OFF position, unless otherwise required by the procedure. For circuits that are not controlled by the ignition switch (e.g., lights), disconnect the negative terminal on the battery. (See instructions on the next page.) • Even though the ignition is in the OFF position, an electric radiator fan can start to operate at any time by an increase in under-hood temperatures. Make sure the radiator fan is completely disconnected when working under the hood. • Always wear safety glasses for eye protection. • Use safety stands whenever a procedure requires you to be under the vehicle. • Set the parking brake when working on the vehicle and if the vehicle has an automatic transmission, put the transmission in PARK. • Operate the engine only in a well-ventilated area to avoid the danger of carbon monoxide. • Keep yourself and your clothing away from moving parts when the engine is running, espe- cially the fan and belts. • To prevent serious burns, avoid contact with hot metal parts such as the radiator, exhaust mani- fold, tail pipe, catalytic converter, and muffler. • Do not smoke while working on the vehicle. • To avoid injury, always remove rings, watches, loose hanging jewelry, and loose clothing before beginning to work on a vehicle. Tie long hair securely behind your head. • Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose, and throat. To remove R-134a from the A/C system use service equipment certified to meet the requirements of SAE J2210 (R-134a recycling equipment). IF accidental system discharge oc- curs, ventilate work area BEFORE resuming service. Additional health and safety information may be obtained from refrigerant and lubricant manufacturers.

8 Aeromaster on Workhorse Chassis—Body Wiring Manual Disconnecting the Battery The battery is located underneath a step in the right- hand stepwell. 1. Make sure the ignition switch is “Off.” 2. Unhook or unscrew the latches and flip up the battery panel (or remove the access cover) on the right-hand stepwell. 3. Disconnect the battery negative (black) cable.

Reporting Safety Defects (U.S. Only) If you believe that your vehicle has a defect that could cause a crash, injury, or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA), in addition to notifying Utilimaster. If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in individual problems between you, your dealer, or Utilimaster. To contact NHTSA, you may either call the Auto Safety Hotline toll-free at 888-327-4236 or file a complaint online at:

http://www-odi.nhtsa.dot.gov/ivoq or write to: U.S. Department of Transportation National Highway Traffic Safety Administration Office of Defects Investigation NVS-216, 1200 New Jersey Avenue, SE Washington, DC 20590

Aeromaster on Workhorse Chassis—Body Wiring Manual 9 More Information Utilimaster Quick Reference Parts Guide Easily find commonly replaced parts for most Utilimaster vehicles in the Utilimaster Quick Reference Parts Guide. This illustrated document includes part numbers for bumpers, door hardware, electrical components, window glass, heater, air conditioner, hood, mirrors, sun visors, vents, mud flaps, roll-up door parts, seats, wiper, and many other parts. It also includes sealants, window replacement, and other repair kits. Utilimaster Body on Workhorse Chassis Parts Manual Find parts specific to Utilimaster bodies mounted on GM, GMC, Chevy, or Workhorse chassis in the Aeromaster on Workhorse Chassis—Body Parts Manual. Utilimaster Glossary of Terms If you are not familiar with some of the terminology used in this manual, you can find many Utilimaster and industry associated terms and definitions in the Utilimaster Glossary of Terms—Body Information Guide. Utilimaster Body Service Manual Read about routine maintenance procedures, troubleshooting, proper adjustment methods, vehicle repair, aftermarket upgrades, and much more in the Utilimaster Vehicles—Body Service Manual. Download Files Many support documents are downloadable (as Adobe® Acrobat® PDF files) from our web site at www.utilimaster.com. Click on the Technical Manuals button, to access the download page. To view the files you must have the Adobe Acrobat Reader version 3.0 or higher installed on your computer. Acrobat readers are available free for all leading computer operating systems on the Adobe web site (www.adobe.com). Contact Utilimaster Browse our site for more information about Utilimaster and its products or contact Utilimaster Customer Service by using one of the following methods: • Call 800-237-7806 • Email to [email protected]. • Mail to the following address: Utilimaster Attn: Customer Service Department 603 Earthway Blvd. Bristol, IN 46507-9182.

10 Aeromaster on Workhorse Chassis—Body Wiring Manual Wiring Diagrams 1—Wire Color Code and Symbol Key RY FROM VA Y CAVITY IDENTIFICATION CONNECTOR NUMBER Cover page Diagram 58231015a01 SHEET 1 Cover page Diagram 58231015a01 SHEET A CONN. DESCRIPTION C101 CONNECTOR NUMBER CONNECTOR RT NO. CONN. PA A C100 C100 12020991 SYMBOL CONNECTOR COWL CONNECTOR COWL SPLICE CONTINUE TO ANOTHER SHEET ANOTHER SHEET CONTINUED FROM NUMBER ASSIGNED NUMBER CONTINUED WITH NO NOTES: All connectors are shown in the load (wire lead insertion) position. 1) 2) Special customer options may not be covered by these diagrams. MA EQIPTMENT 3) WIRE COLORS ON SOME OPTIONAL THIS DOCUMENT. - WIPER POWER - GROUND - LOW SPEED - HIGH SPEED - PARK PUMP - WASHER 840 GY 16 840 GY 120 OR 510 BK/WT 820 DG 16 830 RD 16 18 890 VT GROUNDED T O BODY WIRE GAUGE SIZE WIRE COLOR CIRCUIT NUMBER CIRCUIT BK - BLACK - GRAY GY PK - PINK RD - RED 18 - 18GA 16 - 16GA 14 - 14GA 12 - 12GA BR - BROWN DB - DARK BLUE DG - DARK GREEN BLUE LB - LIGHT GREEN LG - LIGHT OR - ORANGE YELLOW - YL - VIOLET VT - WHITE WT 500 BK 14 WIRE GUAGE CHART: WIRE COLOR CODE:

Aeromaster on Workhorse Chassis—Body Wiring Manual 11 2—Connectors Cummins ISB4 Diesel Only

NOTE: These connectors 350 BK/PK 18 180B PK 18

are specific to vehicles PK/BK 12 110 with the Cummins ISB4 170 RD 12 2 AB 5 4 3 AJAR 1 diesel engine. These DOOR the standard wiring) the standard 5 (No equivalent exists in (No equivalent exists RELAY

replace the standard con- IGNITION nectors on the following ISB4 Connectors - Diagram 16513321b Sheet 2 10 pages (see large circled D E C F numbers). For vehicles 500C BK 18 B C108 G A without the ISB4 engine, WIPER see only the following 120 OR 16

pages. To identify the 18 890 VT F 4 830 RD 16 820 DG 16 840 GY 16 840 GY

engine of a vehicle, see 200 DB 16 page 6. DE LIGHTING INTERIOR ABC AB DOME LIGHT 500 BK 14 520 BK 16 230 BN 18 280 LB/RD 18 A 3 POWER BATTERY 234 RD 16 AB 8 HIGH STOP LIGHT 150 RD 14 MOUNT 200 DB 16 120 OR 16 820 DG 16 520 BK 16 890 VT 18 890 VT 500B BK 16 120A OR 16 120A 820 DG 16 2 830 RD 16 321 654 987 C110 FEED POWER A CHASSIS D B 7 C E C207 P/N 12065158 WIPER MOTOR 830 RD 16 840 GY 16 840 GY 180A PK 16 180A 840 GY 16 840 GY 234 RD 16 280 LB/RD 18 700 DB/WT 12 700 DB/WT 110 PK/BK 12 110 F 150 RD 14 130B RD 14 E D 10 13 11 14 C 1 321 654 987 69 12 15 C112 FEED POWER in the VIN number is P, the vehicle has the Cummins ISB4 diesel engine. These connectors replace those of the equivalent standard connectors. These connectors replace those of the equivalent standard engine. the Cummins ISB4 diesel the vehicle has the VIN number is P, in POWER CHASSIS t AB 130 RD 14 ACCESSO RY 700 DB/WT 12 700 DB/WT 170 RD 12 180 PK 16 130A RD 14 130A 230 BN 18 500A BK 16 500A 350 BK/PK 18 NOTE: If the eighth digi NOTE: If

12 Aeromaster on Workhorse Chassis—Body Wiring Manual 2—Connectors

Standard 840 GY 830 RD 180 PK 510 BK/WT 235 YL 235 230 BR 3 6 NOTE: These 9 242 RD/BK 2 5 8

connectors are C 111 240 LG/BK - Diagram 58231008a Sheet 2 770028-1 1 4 7 standard to all 233 DG Connectors 239 DB (DRL UNITS ONLY) 239 DB (DRL vehicles except POWER FEED #1 CAP 890 VT C200 DC BA 12015799 200 DB

those with 820 DG 120 OR 520 BK the Cummins FEED LAMP FORWARD UNITS BUILT AFTER 03/31/97 UNITS BUILT ISB4 diesel FE engine. For the connectors 120 OR 200 DB 2 on the follow- ISB4 520 BK

ing pages that 510 BK/WT are marked 230 BR 240 LG/BK C110

with a large YL 235 770021-1 321 654 987 235 YL 235 circled num- 242 RD/BK E POWER FEED #1 PLUG 230 BR C

ber, see the B 890 VT C200 D 12034342 A A D 830 RD

replacement 820 DG B 840 GY 180 PK C204 FORWARD LAMP FEED LAMP FORWARD C 12065158

on page 12. E UNITS BUILT BEFORE 03/31/97 UNITS BUILT HEADLAMP FEED HEADLAMP For vehicles LT 233 DG

without the 242 RD/BK UNITS W/O DAYTIME RUNNING LIGHTS UNITS W/O DAYTIME 500 BK 820 DG 240 LG/BK ISB4 engine, 830 RD 710 DG 840 GY 890 VT

ignore page 120 OR 12. To identify D E F the engine of V GH a vehicle, see A BC IJ C101 236 LG R KL 350 BK/PK 230 BR 500 BK 700 DB/WT 12020005 500 BK 240 LG/BK page 6. 170 RD PQ S TU COWL CONNECTOR COWL 150 RD 130 RD 230 BR O N M 6 3 9 12 1514 E C 2 5 8 11 B C113 C203 770030-1 D 1 4 7 12034342 10 13 A 510 BK/WT POWER FEED #2 (CAP) HEADLAMP DIST RT HEADLAMP 238 YL 238 232 DG 710 DG 234 RD 233 GY 280 LB/RD 242 RD/BK 110 PK/BK 110 231 BR/WT 232 DG 238 YL 238 236 LG 230 BR 110 PK/BK 110 234 RD 258 LB/WT 510 BK/WT 170 RD O N M 234 RD 1 280 LB/RD 700 DB/WT 120 OR ISB4 S LK 110 PK/BK 110 233 DG 242 RD/BK 150 RD 230 BR R QP JI 130 RD C100 A HG A 12020991 10 13 D B CB V UT C202 11 14 COWL CONNECTOR COWL 12065158 C C112 E 770023-1 321 654 987 D E F 12 15 HEADLAMP FEED RT HEADLAMP POWER FEED #2 (PLUG) 890 VT 257 LB 840 GY 710 DG 500 BK 170 RD 820 DG 240 LG/BK 510 BK/WT 231 BR/WT 350 BK/PK 700 DB/WT 255 DB 253 DB/WT 830 RD

Aeromaster on Workhorse Chassis—Body Wiring Manual 13 2—Connectors Standard (continued) 256 RD 222 YL/BK 222 7 6 4 500 BK 890 VT B SW (BATTERY) C301 C340 A DC RY 12015024 999-16716.001 3 1 8 AUX. HTR (SCS) B A C206 AUXILIA 500 BK 480115-1 Connectors - Diagram 58231008a Sheet 3 WASHER PUMP WASHER 254 YL 254 150 RD YL 220 500 BK 280 LB/RD YL/WT 224 280 LB/RD 530 BK 700 DB/WT 710 DG 240 LG/BK BA 2 1 4 3 C210 C331 12015792 770209-1 (DAYTIME RUNNING) (DAYTIME

HVAC CONN. (SCS) HVAC DRL L 242 RD/BK 235 Y 230 BR 240 LG/BK A 242 RD/BK 530 BK 710 DG 700 DB/WT 280 LB/RD 710 DG 500 BK 239 DB C205 12015799 DCB 4 3 2 1 A C330 C209 770019-1 LEFT HEADLAMP DIST HEADLAMP LEFT 12015791 HVAC CONN. HVAC A/C JUMPER FE UNITS W/ DAYTIME RUNNING LIGHTS UNITS W/ DAYTIME 7 6 4 235 GY SW (IGNITION) C304 230 BR 240 LG/BK 999-16716.001 3 A 1 8 242 RD/BK 500 BK AUXILIA RY 500 BK 239 DB 255 DB C204 DCB 12010975 280 LB/RD 253 DB/WT 110 PK/BK 110 510 BK/WT LEFT HEADLAMP FEED HEADLAMP LEFT FE UNITS W/ DAYTIME RUNNING LIGHTS UNITS W/ DAYTIME C208 7 A 6 4 12015791 WIPER MOTOR (STD) WIPER MOTOR SW (BATTERY) C303 999-16716.001 3 1 8 7 AUXILIA RY ISB4 500 BK 120 OR 500 BK 820 DG 150 RD 257 LB 240 LG/BK 230 BR 280 LB/RD 258 LB/WT 7 6 E 4 C B C C207 B 12015798 C205 D A SW (IGNITION) D 12034342 A C302 HEADLAMP DIST HEADLAMP RY WIPER MOTOR (STD) WIPER MOTOR 3 999-16716.001 LT 1 8 500 BK AUXILIA UNITS W/O DAYTIME RUNNING LIGHTS UNITS W/O DAYTIME 840 GY 242 RD/BK 235 GY 830 RD 254 DG 280 LB/RD 256 DG/WT 110 PK/BK 110

14 Aeromaster on Workhorse Chassis—Body Wiring Manual 2—Connectors Standard (continued) 231 BR/WT 231 BR/WT A C511 12015952 6 3 9 12 1514 2 5 8 11 C413 CLEARANCE LIGHT FEED CLEARANCE LIGHT 770029-1 1 4 7 10 13 Connectors - Diagram 58231008a Sheet 4 "A" PILLAR (ROOF) PILLAR "A" 4 ISB4 200 DB 840 GY 820 DG 220 YL 220 120 OR G 830 RD 520 BK 890 VT 200 DB EF 520 BK C510 12010429 WIPER SWITCH AB CD 150 RD 234 RD 9 ISB4 238 YL 238 232 DG 230 BR 222 YL/BK 222 256 DG/WT 350 BK/PK 200 DB 257 LB 3 ISB4 C419 41 52 63 770027-1 150 RD 10 13 REAR LIGHTING INTERIOR ROUTED A 11 14 C507 C412 12004886 770022-1 32 1 65 4 98 7 12 15 234 RD 236 LG 500 BK FUSEBLOCK(BATT) "A" PILLAR (PILLAR) 220 YL 220 500 BK 6 254 DG ISB4 520 BK 180 PK/BK 700 DB/WT 258 LB/WT 224 YL/WT 224 231 BR/WT A C506 12004885 9 ISB4 FUSEBLOCK (HTR) FUSEBLOCK 150 RD 234 RD 222 YL/BK 222 256 DG/WT 350 BK/PK 200 DB 500 BK 236 LG 234 RD 257 LB 41 52 63 110 PK/BK 110 10 13 C418 770020-1 A 11 14 C504 C411 REAR LIGHTING 12004740 INTERIOR ROUTED 770022-1 32 1 65 4 98 7 12 15 FUSEBLOCK (AUX) FUSEBLOCK "A" PILLAR (PILLAR) 238 YL 238 232 DG 230 BR N APPLICATIO STANDARD 220 YL 220 500 BK 6 ISB4 254 DG 520 BK 180 PK/BK 170 RD SEE ALSO 16513321b FOR THE 4BT CUMMINS THE 4BT ALSO 16513321b FOR SEE 258 LB/WT 224 YL/WT 224 231 BR/WT A C503 12004883 FUSEBLOCK (PWR) FUSEBLOCK 231 BR/WT 6 258 LB/WT 180 PK ISB4 180 RD 224 YL/WT 224 256 DG/WT 254 DG C415 231 BR/WT A MOLED CONN. "A" PILLAR (ROOF) PILLAR "A" C501 257 LB 12004888 6 3 9 FUSEBLOCK (ACCY) FUSEBLOCK 12 1514 2 5 8 11 C410 770029-1 1 4 7 10 13 "A" PILLAR (DASH) PILLAR "A" 280 LB/RD 231 BR/WT 220 YL 220 A C500 500 BK 234 RD 12004884 C414 520 BK 150 RD 200 DB 350 BK/PK 222 YL/BK 222 FUSEBLOCK (LPS-GM) FUSEBLOCK MOLDED CONN. "A" PILLAR (ROOF) PILLAR "A"

Aeromaster on Workhorse Chassis—Body Wiring Manual 15 2—Connectors

Standard (continued) 230 BR 236 LG 234 RD 500 BK A A D C622 B 12010996 C634 C E 12065158 REAR LAMP DIST REAR LAMP LICENSE PLATE LAMP LICENSE PLATE LT Connectors - Diagram 58231008a Sheet 5 230 BR 238 GY 230 BR A C621 12010996 238 YL 238 500 BK 500 BK 230 BR LICENSE PLATE LAMP LICENSE PLATE 236 LG E C B B D C633 A C638 230 BR 12034342 C REAR LAMP FEED REAR LAMP BACK-UP LAMP BACK-UP MOLDED CONN. LT LT A C620 234 RD 236 LG 12010996 LICENSE PLATE LAMP LICENSE PLATE 500 BK 236 LG 238 GY/ 234 RD 234 RD 500 BK B A C D C637 A B C632 C E STOP/TURN/TAIL 12065158 MOLDED CONN. 9 BR (TAIL) 19 DG ( RT TURN/STOP) LT 150 BK (GROUND) 230 BR REAR LAMP DIST RT REAR LAMP T TURN/STOP) 18 YL 18 (L 230 BR 232 GY DE BG A C611 12110753 FC GM REAR LAMP FEED GM REAR LAMP 500 BK 232 DG 24 LG 500 BK 236 LG 20 LB 230 BR (BACKUP) B (STOP ONLY) (STOP E C636 C C B D C631 MOLDED CONN. A 12034342 BACK-UP LAMP RT BACK-UP REAR LAMP FEED RT REAR LAMP 234 RD 236 LG 230 BR 232 DG 238 YL 238 500 BK 232 GY/234 RD DE BG 230 BR A C610 B 12110751 FC REAR LAMP DIST REAR LAMP C C635 A A C623 12010996 MOLDED CONN. RT STOP/TURN/TAIL LICENCE PLATE LAMP LICENCE PLATE 230 BR 18 236 LG 234 RD

16 Aeromaster on Workhorse Chassis—Body Wiring Manual 2—Connectors 500 BK B

Standard (continued) 235 GY C713 C A MOLDED CONN. FRON T TURN LAMP LT 230 BR Connectors - Diagram 58231008a Sheet 6 233 GY 500 BK B C712 C C MOLDED CONN. RT FRON T TURN LAMP 230 BR 500 BK 242 RD/BK A 242 RD/BK C C C710 12077384 B B C711 12048369 A 240 LG/BK HALOGEN HDLP RECT. INCAD. HDLP RT RECT. LT 240 LG/BK 239 DB 5 ISB4 350 BK/PK 242 RD/BK C A C661 B C711 12077412 DOOR AJAR DOOR 12048369 240 LG/BK A HALOGEN HDLP LT 500 BK 234 RD 8 ISB4 231 BR/WT 239 DB 242 RD/BK 170 RD A 85 C645 A 12077412 87 30 C 87a C720 C711 STOP LAMP FEED LAMP STOP W/DRL B 12077384 3-334-485-007 86 RECT. INCAD. HDLP RECT. LT CLEARANCE LIGHT RELAY CLEARANCE LIGHT 500 BK 231 BR/WT 240 LG/BK 500 BK 500 BK 238 GY 242 RD/BK 230 BR B A A C A C642 C711 B 12077384 C715 MOLDED CONN. REAR TURN LAMP REAR LT RECT. INCAD. HDLP RECT. B MOLDED CONN. LT FRONT SDMRKR LAMP FRONT LT 235 GY 240 LG/BK 500 BK 232 GY 242 RD/BK 230 BR B A 240 LG/BK C641 A MOLDED CONN. C C714 B REAR TURN LAMP RT REAR B C710 MOLDED CONN. 12048369 A FRONT SDMRKR LAMP RT FRONT RT HALOGEN HDLP 233 GY 500 BK

Aeromaster on Workhorse Chassis—Body Wiring Manual 17 3—Harness Layout (Connector Locations) REAR STRUCTURE ROOF TO CONNECTION(NO CONN. #'S) C638 C637 C642 LT CLRC C634 LT Harness Layout - Diagram 58231008a Sheet 7 CLRC LT C620 CLRC CLRC LT C633 LT CLRC C621 LT CLRC C635 C641 C636 C610 ALARM C632 BACKUP C631 C611 LT CLRC CARGO LIGHT FUSE BLOCK C500-C507 S LT CLR C510 WIPER C511 C419 C418 P LMP S TO C661 C110 C413 C412 POWER FEED HARNESS CARGO LIGHT C645 AJAR C112 DOOR PWR FEED DOME C415 LIGHT C414 C101 C715 LT C204 CLRC C205 VIEW-AA C411 LT CLRC LT CLRC C209 C200 C210 LT CLRC C711 C713 GROUNDS C301 DASH C302 C100 COWL SWITCHES C206 LT CLRC C710 C303 C712 C208 C207 C714 C304 PST QTR C202 C203 C116 S LT CLR C720 PWR FEED C113 C 111 R VIEW-AA CIG LT (UNDER DASH) MAIN HARNESS C330 C331 TO SCS WIRING

18 Aeromaster on Workhorse Chassis—Body Wiring Manual 4—Power Distribution RELAY RELAY T T SWITCHES SWITCHES SWITCHES Y Y Y Power Dist - Diagram 58231008a Sheet 8 CIGARETTE LIGHTER AUXILIAR STEREO STEREO AUXILIAR LAMPS PANEL HVAC USED NOT SYSTEM HVAC DRL-DOMESTIC CLEARANCE LIGH AUXILIAR DRL-DOMESTIC EXCITER CIRCUIT OR ISOLATOR WIPER SYSTEM CLEARANCE LIGH D C100 130 RD 16 150 RD 14 150 RD 16 280 LB/RD 18 280 LB/RD 18 12 700 DB/WT 12 700 DB/WT 170 RD 14 PK/BK 14 110 PK/BK 16 110 120 OR 16 180 PK 16 170 RD 12 18 231 BR/WT D A 3 C510 C511 C113 C113 3 11 C112 C112 POWER DISTRIBUTION (STANDARD) DISTRIBUTION POWER YL 11 2 9 4 8 C113 C113 C113 C113 11 2 9 4 8 C112 C112 C110C112 C 111 C112 YL 110 PK/BK 14 110 X U A B C 170 RD 12 GRY GRY TURN 25 BR 30A PWR 20A 15A FLASHER WIPER ECM-BAT ENG-BAT 130 RD 16 700 DB/WT 12 700 DB/WT RED RED RED PWR 150 RD 14 280 LB/RD 18 GRN GRN GRN HTR 5A 25A HTR 15A 15A 1-3 30A AUX. TURN-BU INST-LPS FUSE/PLR BRN BRN BRN IGN 180 PK 16 WHT BLU BLU YL 20A 10A 20A 20A 10A ECM-1 ENG-1 TRANS GAUGES ACC-RADIO WHT ACC WHT WHT 150 RD 14 FUSE BLOCK 15 15A 20A IL LPS IL HORN/DM STP/HZD BATT TA WIPER SWITCH SWITCH HEADLAMP TO CHASSIS TO TO CHASSIS TO

Aeromaster on Workhorse Chassis—Body Wiring Manual 19 5—Grounding System ROOF CENTRAL GROUND WIPER SYSTEM 14 C412 Grounding Sys - Diagram 58231008a Sheet 9 HVAC SYSTEM HVAC LAMPS PANEL INTERMITTENT WIPER MODULE INTERMITTENT 510 BK/WT 16 510 BK/WT 14 C411 CLEARANCE LIGHT RELAY CLEARANCE LIGHT AUXILIARY SWITCHES AUXILIARY CIGARETTE LIGHTER 8 C110 14 C410 8 C 111 500 BK 18 500 BK 18 500 BK 14 530 BK 12 500 BK 18 500 BK 16 500 BR 16 500 BK 12 COWL GROUNDING SYSTEM 500 BK 14 500 BK 18 500 BK 16 500 BK 14 500 BK 16 (SCS ONLY) WASHER PUMP WASHER DRL-DOMESTICS FORWARD LAMPS FORWARD AUXILIARY HEATER AUXILIARY

20 Aeromaster on Workhorse Chassis—Body Wiring Manual 6—Switches Y Y , BASED RY VA Y BE WIRED DIFFERENTL Y SWITCHING ONL SWITCHING

Switches - Diagram 58231008a Sheet 10 CARGO LIGHT CARGO LOAD FUNCTION MA Y TO WA ON/ON 3- ON/ON ON/OFF/ON AUX. HEATERS, DASH FANS, (2 SPEED LOADS) DASH FANS, AUX. HEATERS, ON/OFF/ON

WIRE COLOR THIS OR OTHER SHEETS. THAN SHOWN ON SWITCH USAGES: TYPICAL HTD MIRRORS, POWER VENTS ON/OFF LIGHTING, ON OPTIONS CHOSEN AND NUMBER OF SWITCHED ON OPTIONS CHOSEN OPTIONS CHOSEN. REQUESTED OPTIONS MA SPECIAL 12 11 3 2 1 8 9 C412 C412 C412 C412 C412 C412 C412 14 T 257 LB 14 258 LB/WT 14 258 LB/WT 220 YL 14 YL 220 222 YL/BK 18 222 224 YL/WT 14 YL/WT 224 256 DG/W 254 DG 14 SWITCHES 12 11 8 1 3 2 9 C411 C411 C411 C411 C411 C411 C411 PANEL LAMPS GROUND PANEL U V 8 9 1 3 2 K 12 11 H C100 C100 C100 C100 C410 C410 C410 C410 C410 C410 C410 500 BK 18 14 T 110 PK/BK 14 110 500 BK 18 280 LB/RD 18 110 PK/BK 14 110 500 BK 18 500 BK 18 280 LB/RD 18 150 RD 14 150 RD 14 256 DG/W 254 DG 14 280 LB/RD 18 500 BK 18 280 LB/RD 18 280 LB/RD 18 PK/BK 14 110 222 YL/BK 18 222 14 YL/WT 224 150 RD 14 14 YL 220 253 DB/WT 14 253 DB/WT 255 DB 14 258 LB/WT 14 258 LB/WT 257 LB 14 1 2 3 7 8 1 2 3 7 8 1 2 3 7 8 1 2 3 7 8 6 C304 C304 C304 C304 C304 C301 C301 C301 C301 C301 C303 C303 C303 C303 C303 C301 C302 C302 C302 C302 C302 LY 6 7 7 7 7 6 ON/ON ON/OFF ON/OFF ON/OFF/ON THEY ARE NOT NECESSARI ARE NOT THEY 3 3 8 2 8 8 2 2 8 2 8 2 3 1 1 1 3 POWER Y. THE CONNECTOR NUMBER THE CONNECTOR DISTRIBUTION TO POWER) POWER) POWER) POWER) MATCHED MATCHED SWITCHES SHOWN ARE FOR VISUAL FUNCTIONAL ARE FOR VISUAL SWITCHES SHOWN REASONS ONL SHOWN. SWITCH 1 SWITCH 4 (IGNITION SWITCH 2 (IGNITION SWITCH 3 (BATTERY (BATTERY AUXILiARY AUXILIARY AUXILiARY AUXILIARY

Aeromaster on Workhorse Chassis—Body Wiring Manual 21 7—Cargo Lamps REAR SWITCH

Standard LIGHT CARGO 7 ON/OFF 8 2 3 Cargo Lights Std - Diagram 58231008a Sheet 30 220 YL 16 YL 220 220 YL/BK 16 220 220 YL 16 YL 220 220 YL/BK 16 220 LIGHT CARGO 220 YL 14 YL 220 CARGO LIGHTS STANDARD WIRING CARGO LIGHTS STANDARD 220 YL 14 YL 220 150 RD 14 150 RD 18 222 YL/BK 18 222 224 YL/WT 14 YL/WT 224 JUMPER WIRE POWER DISTRIBUTION

22 Aeromaster on Workhorse Chassis—Body Wiring Manual 7—Cargo Lamps LIGHT CARGO Switch on Dash 220 YL 16 YL 220 Cargo Lights Switched at Dash - Diagram 58231008a Sheet 31 220 YL 14 YL 220 CARGO LIGHTS SWITCHED ON DASH 500 BK 18 280 LB/RD 18 150 RD 14 280 LB/RD 18 500 BK 18 222 YL/BK 18 222 224 YL/WT 14 YL/WT 224 150 RD 14 14 YL 220 2 3 8 GROUND ON/OFF ILLUMINATION 7 POWER DISTRIBUTION POWER DISTRIBUTION AT DASH CARGO LIGHT CARGO SWITCHED

Aeromaster on Workhorse Chassis—Body Wiring Manual 23 7—Cargo Lamps Three-Way Switch 1 2 3 8 8 ITC H W S ON/ON REAR CARGO LIGHT 6 7 Cargo Lights 3-Way Switch - Diagram 58231008a Sheet 32 Cargo Lights 3-Way LIGHT CARGO 222 YL 16 YL 222 YL/BK 16 224 YL/BK 16 220 1 3 2 C413 C413 C413 SWITCH 1 3 2 AY C412 C412 C412 222 YL/BK 18 222 14 YL/WT 224 220 YL 14 YL 220 CARGO LIGHTS 3-W 1 3 2 C411 C411 C411 1 3 2 C410 C410 C410 500 BK 18 280 LB/RD 18 150 RD 14 14 L 280 LB/RD 18 500 BK 18 222 YL/BK 18 222 224 YL/WT 14 YL/WT 224 150 RD 14 220 Y 8 7 6 1 2 3 C301 C301 C301 C301 C301 C301 GROUND 1 1 8 2 8 2 3 ILLUMINATION POWER DISTRIBUTION POWER DISTRIBUTION DASH ON/ON SWITCH ON CARGO LIGHT CARGO 6 7

24 Aeromaster on Workhorse Chassis—Body Wiring Manual 8—Wiper System Standard and Cummins ISB4 Intermittent G 11 M WIPER MOTOR PUMP L H B P M WASHER Wiper Sys - Diagram 58231008a Sheet DG RD BK YL BR A B C206 C206 B A C D A C207 C207 C207 C207 C208 890 VT 18 890 VT 500 BK 18 510 BK/WT 16 510 BK/WT 120 OR 16 820 DG 16 830 RD 16 16 840 GY 890 VT 18 890 VT A F E G B J C101 C101 C101 C101 C101 C101 A B F E G J C100 C100 C100 C100 C100 C100 STANDARD WIPERS STANDARD GROUND 890 VT 18 890 VT 830 RD 16 16 840 GY 120 OR 16 820 DG 16 510 BK/WT 16 510 BK/WT 4 2 5 3 6 8 C 111 C 111 C 111 C 111 C 111 C 111 4 2 5 3 6 8

C110 C110 C110 C110 C110 C110 510 BK/WT 16 BK/WT 510 GROUND 890 VT 18 890 VT 830 RD 16 16 840 GY 120 OR 16 820 DG 16

B C F D E C510 C510 C510 C510 C510 143 YL 143 94 PK 91 GY 92 VT 96 OR WIPER SWITCH WIPER POWER

Aeromaster on Workhorse Chassis—Body Wiring Manual 25 8—Wiper System Intermittent Option (Non-Cummins ISB4) G M WIPER MOTOR L H B P PUMP M WASHER Wiper Sys Itm - Diagram 58231008a Sheet 12 DG RD BK YL BR A B C206 C206 D B A C A C207 C207 C207 C207 C208 890 VT 18 890 VT 500 BK 18 LEVER. 510 BK/WT 16 510 BK/WT 120 OR 16 820 DG 16 830 RD 16 16 840 GY 890 VT 18 890 VT A F E G B J C101 C101 C101 C101 C101 C101 URN LEVER STALK IS REMOVED FROM THE IS REMOVED FROM URN LEVER STALK T A B F E G J C100 C100 C100 C100 C100 C100 INTERMITTENT WIPERS INTERMITTENT GROUND THE ROSTRA CONTROL AND REPLACED B Y THE ROSTRA COLUMN THE CHASSIS-SUPPLIED 890 VT 18 890 VT 830 RD 16 16 840 GY 120 OR 16 820 DG 16 510 BK/WT 16 510 BK/WT 8 4 2 5 3 6 C 111 C 111 C 111 C 111 C 111 C 111 8 4 2 5 3 6

C110 C110 C110 C110 C110 C110 510 BK/WT 16 BK/WT 510 GROUND GROUND 890 VT 18 890 VT 830 RD 16 16 840 GY 120 OR 16 820 DG 16 B C F D E C510 C510 C510 C510 C510 500 BK 16 WIPER LEVER ROSTRA MODULE ROSTRA (16100186) CONTROL INTERMITTENT WIPER POWER

26 Aeromaster on Workhorse Chassis—Body Wiring Manual 9—Heater Only System

Cable Controls

OR 16 OR DB 16 DB 86 87 87a DB/WT 12 DB/WT MOTOR RELAY BLOWER

Heat Only Sys - Diagram 58231008a Sheet 13

85 30 BK 12 BK

OR/WT 12 OR/WT OR/WT 12 OR/WT MOTOR

BLOWER BK 16 BK DB 16 OR 16 MOTOR BLOWER BK 12

RESISTOR BK 16 BK

HEATER ONLY SYSTEM ONLY HEATER LB 16 LB BN 16 YL 16 YL

HMLBC

ILLUMINATION 16 BK LB 16 LB

BLOWER SWITCH DB/WT 14 DB/WT LB 16 BK 12 DB/WT 12 DB/WT 530 BK 12 280 LB/RD 18 700 DB/WT 12 700 DB/WT POWER POWER GROUND DISTRIBUTION DISTRIBUTION

Aeromaster on Workhorse Chassis—Body Wiring Manual 27 9—Heater Only System POWER Electronic Controls POWER GROUNDING GROUNDING DISTRIBUTION DISTRIBUTION 530 BK 280 LB/RD 700 DB/WT Heat Elect Conrols - Diagram 58231212a Sheet 17

500 BK

RD/BK 731 DB 731 DB 731 M

TER VALVE RD/WT 700 DB/WT 700 CONTROL DB/WT 700 WA TEMPERATURE BK LB DB/WT

PANEL LAMPS PANEL LB

3 BK FAN SWITCH FAN 1 LOW 2 MED LOW 3 MED HIGH 4 HIGH 4 YL/RD 1 DB/WT 1 BR HEAT ONLY ELECTRONIC CONTROLS ONLY HEAT H BLOWER MOTOR RESISTOR BLOWER MOTOR B 2

MODE SWITCH 1 OFF 2 PANEL 3 FLOOR/PANEL 4 FLOOR 5 FLOOR/DEFROST 6 DEFROST A/C 7 A/C MAX 8 VT DB

M DG L DB

YL LG

OR/RD

RD YL/BK DB

CONTROLLER

86 87 YL/WT 87a DB/BK

RELAY DB/WT BLOWER HI BK

85 30 DG/BK

DG/WT BR/BK OR 86 87 87a M M M RELAY 20 SYSTEM POWER 85 30 VENT M M FLOOR DEFROST REC GY MOTOR BLOWER

28 Aeromaster on Workhorse Chassis—Body Wiring Manual

9—HVAC System 16 OR DB 16 DB Cable Controls 86 87 87a DB/WT 12 DB/WT MOTOR RELAY BLOWER

85 30 BK 12 BK

OR/WT 12 OR/WT OR/WT 12 OR/WT MOTOR

HVAC Sys Cable Controls - Diagram 58231008a Sheet 14 HVAC BLOWER

BK 16 BK

BK 16 BK DG 16 DG A/C

SWITCH DG 16 DG DB 16 HVAC SYSTEM HVAC

COMPRESSOR DG 16 DG OR 16

TO DG 16 DG THERMO SWITCH MOTOR BLOWER BK 12

RESISTOR BK 16 BK

710 DG 18 LB 16 LB BN 16 YL 16 YL HMLBC

DG 16 ILLUMINATION 16 BK

SWITCH LB 16 LB

BLOWER SWITCH HI/LO PRESSURE DB/WT 14 DB/WT 710 DG 18 DG 710 DG 18 LB 16 BK 12 DB/WT 12 DB/WT 1 2 3 4 C331 C331 C331 C331 A 1 2 3 4

C209

C330 C330 C330 C330

C C

C100 C101 710 DG 18 DG 710 530 BK 12 700 DB/WT 12 700 DB/WT 280 LB/RD 16 DIST DIST POWER POWER GROUND

Aeromaster on Workhorse Chassis—Body Wiring Manual 29 9—HVAC System (POWER (POWER (POWER (GROUND) DISTRIBUTION) DISTRIBUTION) Electronic Controls DISTRIBUTION) (GROUND) 700 DB/WT 530 BK 280 LB/RD 715 OR/WT 4 1 3 5 C330 C330 C330 C330 HVAC Elect Controls - Diagram 58231212aXX (Sheet 18) HVAC 500 BK 18 4 1 3 5 C331 C331 C331 C331 4 1 5 3 C330 C330 C330 C330 4 1 5 3

C331 C331 C331 C331

C332 BK

7 6 T 6 T

C100 C332 C333 RD/BK C101 C334 731 DB 731 DB 731

8 1 1 S

S M

C100 C332 C333 LV TER VA C101 C334 RD/WT 700 DB/WT 700 DB/WT 700 CONTROL WA TEMPERATURE BK LB NEL

DB/WT PA LAMPS LB SWITCH A SWITCH OPENS @ 460 PSI CLOSES @ 22 PSI NORM CLOSED 86 87 87a OPEN 29°F A/C CLUTCH CLOSED 35°F DE-ICING SWITCH 85 30 DB BK 3

COMPRESSOR CLUTCH BK N SWITCH 4 FA 1 LOW 2 MED LOW 3 MED HIGH 4 HIGH HVAC ELECTRONIC CONTROLS HVAC YL/RD 1 DB/WT 1 BR H BLOWER MOTOR RESISTOR BLOWER MOTOR B 2

MODE SWITCH 1 OFF 2 PANEL 3 FLOOR/PANEL 4 FLOOR 5 FLOOR/DEFROST 6 DEFROST A/C 7 A/C MAX 8 VT DB

M DG L DB

YL LG

OR/RD

RD YL/BK DB

CONTROLLER

86 87 YL/WT 87a DB/BK

RELAY DB/WT BLOWER HI BK

85 30 DG/BK

DG/WT BR/BK OR 86 87 87a RELAY 20 SYSTEM POWER 85 30 REC GR VENT M M M M M FLOOR DEFROST GY MOTOR BLOWER

30 Aeromaster on Workhorse Chassis—Body Wiring Manual 10—Chassis Supplied A/C Prep VCM J3-30 (L31/L35) VCM J3-25 (L31/L35) J1-2 (E.D. L57/NB6) VCM J3-1(L31/L35) J3-5(E.D. L57/NB6) TO TO TO A/C CMPR CLU COIL Chasis Prep AC - Diagram 58231008a Sheet 15 Chasis Prep A B C166 C166 250 59 450 BLK .08 BLK 0.8 762 DK GRN 0.8 DK GRN/WHT 0.8 DK GRN/WHT 899 899 899 ACKAGE 459 250 DK GRN/WHT 0.8 DK GRN/WHT P BLK .08 .75 W 899 1.1 K OHM (L31/L35) A/C PREP A/C

(GM FORMAT) 59 DK GRN 0.8 DK GRN 0.8 762 603 (L31/L35) CHASSIS SUPPIED CHASSIS DK GRN/WHT 0.8 DK GRN/WHT BLK 0.8 250 (L57) C115 B B C115 CONNECTOR (L31/L35) (SHEET 14) (SHEET BODY BUILDER BODY 86 86 C119 C119 87 C119 DENOTES MECHANICAL DIESEL ONLY DIESEL DENOTES MECHANICAL E.D. DENOTES ELECTRONIC DIESEL RELAY CUTOFF SW CUTOFF A/C CMPR A/C CMPR HIGH PRESS A 30 C119 85 85 C115 C119 C119 540 203 (L57/NB6) BLU 0.8 CONNECTOR ORN 0.8 LT PINK 0.8 BODY BUILDER BODY 39 (L31/L35) 762 (L57) C118 C118 B B DK GRN/WHT 0.8 DK GRN/WHT SWITCH SWITCH A/C CMPR A/C CMPR REFRIG PRESS REFRIG PRESS A A 922 GRA 0.8 GRA C118 C118 20A "GAUGE" FUSE 20A 15A "ENG-BAT" FUSE "ENG-BAT" 15A 250 BLK .08

Aeromaster on Workhorse Chassis—Body Wiring Manual 31 11—Front Light Wiring With Cummins ISB4 Diesel Engines LEFT LEFT RIGHT LEFT RIGHT RIGHT HEADLAMP HEADLAMP SIDEMARKER TURN SIGNAL SIDEMARKER TURN SIGNAL B C A B C C B C B A B A A B A A C715 C715 C713 C713 C713 C710 C712 C712 C712 C714 C714 C711 C711 C710 C710 C711 Forward Lamp Wiring (Canadian DRL) - Diagram 58231008a Sheet 17 239 DB 16 230 BR 18 230 BR 18 500 BK 18 240 LG/BK 18 242 RD/BK 16 242 RD/BK 16 500 BK 16 240 LG/BK 16 18 233 GY 500 BK 18 230 BR 18 18 233 GY 230 BR 18 235 GY 18 235 GY 18 235 GY 239 DB 16 230 BR 18 500 BK 16 240 LG/BK 18 242 RD/BK 16 240 LG/BK 18 500 BK 16 230 BR 18 235 GY 18 235 GY 233 GY 18 233 GY 242 RD/BK 16 C205 C205 C205 C205 C205 C203 C203 C203 C203 C203 B E A C D C A E B D F D F B E A C D C A E B C204 C205 C204 C204 C204 C204 C204 C202 C202 C202 C202 C202 18 FORWARD LAMP WIRING (W/DRL CANADA) WIRING (W/DRL LAMP FORWARD 235 Y L 235 242 RD/BK 16 240 LG/BK 18 233 DG 18 230 BR 18 239 DB 16 500 BK 16

NOTE: This schematic is for all vehicles with the Cummins ISB4 diesel engine. C200 C200 C200 C200 C200 A C D E B F For domestic vehicles without the ISB-4 C200 engine, see the following pages. To identify the engine of a vehicle, see page 6. GROUNDING (This is schematic is also the same one used in all Canadian vehicles.) HEADLAMP FEED CONNECTION

32 Aeromaster on Workhorse Chassis—Body Wiring Manual 11—Front Light Wiring Without Daytime Running Lights LEFT LEFT RIGHT LEFT RIGHT RIGHT HEADLAMP HEADLAMP SIDEMARKER TURN SIGNAL SIDEMARKER TURN SIGNAL A B A A A B C C B C B A B A B C C711 C715 C715 C713 C713 C713 C712 C712 C712 C714 C714 C710 C711 C711 C710 C710 /O DRL and Can W/DRL - Diagram 58231008a16 /O DRL and Can W Forward Lamp Wiring Dom 235 GY 18 235 GY 18 235 GY 230 BR 18 230 BR 18 500 BK 18 240 LG/BK 18 500 BK 16 242 RD/BK 16 242 RD/BK 16 500 BK 16 240 LG/BK 16 18 233 GY 500 BK 18 230 BR 18 18 233 GY 230 BR 18 230 BR 18 240 LG/BK 18 242 RD/BK 16 242 RD/BK 16 240 LG/BK 18 500 BK 16 230 BR 18 500 BK 16 235 GY 18 235 GY 18 233 GY C205 C205 C205 C205 C205 C203 C203 C203 C203 C203 B E A C D D C A E B B E A C D D C A E B C204 C204 C204 C204 C204 C202 C202 C202 C202 C202 235 YL 18 YL 235 242 RD/BK 16 240 LG/BK 18 233 DG 18 230 BR 18 500 BK 16 FORWARD LAMP WIRING LAMP FORWARD

NOTE: This schematic is for domestic vehicles without the Cummins ISB4 C200 C200 C200 C200 C200 diesel engine. For vehicles with the

ISB-4 engine, see page 32. To identify GROUNDING the engine of a vehicle, see page 6. HEADLAMP FEED CONNECTION

Aeromaster on Workhorse Chassis—Body Wiring Manual 33 11—Forward Light Wiring Daytime Running Lights (Domestic) LEFT LEFT RIGHT LEFT RIGHT RIGHT HEADLIGHT HEADLIGHT

NOTE: This sche- MARKER SIDE TURN SIGNAL SIDE MARKE R SIDE TURN SIGNAL matic is for domestic vehicles without the Cummins A B A A B C A B C C B C B A B A C715 C715 C713 C713 C713 C712 C712 C712 C714 C714 C711 C711 C710 C710 C711 ISB4 diesel engine. C710 For vehicles with the ISB-4 engine,

see page 32. To Domestic) - Diagram 58231008a Sheet 18 Forward Light Wiring (DRL 18 18 identify the engine 235 GY 18 235 GY 18 235 GY of a vehicle, see 230 BR 18 230 BR 18 500 BK 18 240 LG/BK 18 500 BK 16 242 RD/BK 16 242 RD/BK 16 500 BK 16 240 LG/BK 16 233 G Y 500 BK 18 230 BR 18 233 G Y 230 BR 18 page 6. 18 230 BR 18 240 LG/BK 18 242 RD/BK 16 242 RD/BK 16 240 LG/BK 18 500 BK 16 230 BR 18 235 GY 18 235 GY 233 G Y 500 BK 16 C205 C205 C205 C205 C205 C203 C203 C203 C203 C203 B E A C D D C A E B B E A C D D C A E B C204 C204 C204 C204 C204 C202 C202 C202 C202 C202 ARD LIGHT WIRING (W/DRL-DOMESTIC) ARD LIGHT W FOR

235 YL 18 YL 235 242 RD/BK 16 240 LG/BK 18 233 DG 18 230 BR 18 500 BK 16

WT C210 A

DRL

OR MODULE C210 (16511938) BK DG RD C200 C200 C200 C200 C200 D C101 C101 SS D C100 C100 GROUNDING HEADLIGHT FEED CONNECTION IGN PWR GROUND BATT PWR BATT

34 Aeromaster on Workhorse Chassis—Body Wiring Manual 11—Forward Light Wiring Daytime Running Lights (Canadian) LEFT LEFT RIGHT LEFT RIGHT RIGHT HEADLAMP HEADLAMP SIDEMARKER TURN SIGNAL SIDEMARKER TURN SIGNAL A B C C B C B A B A B C A B A A C710 C715 C715 C713 C713 C713 C712 C712 C712 C714 C714 C711 C711 C710 C710 C711 Forward Lamp Wiring (Canadian DRL) - Diagram 58231008a Sheet 17 239 DB 16 230 BR 18 230 BR 18 500 BK 18 240 LG/BK 18 242 RD/BK 16 242 RD/BK 16 500 BK 16 240 LG/BK 16 18 233 GY 500 BK 18 230 BR 18 18 233 GY 230 BR 18 235 GY 18 235 GY 18 235 GY 239 DB 16 230 BR 18 500 BK 16 240 LG/BK 18 242 RD/BK 16 240 LG/BK 18 500 BK 16 230 BR 18 233 GY 18 233 GY 235 GY 18 235 GY 242 RD/BK 16 C203 C203 C203 C203 C203 C205 C205 C205 C205 C205 B E A C D C A E B D F D F B E A C D C A E B C204 C205 C204 C204 C204 C204 C204 C202 C202 C202 C202 C202 18 FORWARD LAMP WIRING (W/DRL CANADA) WIRING (W/DRL LAMP FORWARD 242 RD/BK 16 240 LG/BK 18 233 DG 18 230 BR 18 235 Y L 235 239 DB 16 500 BK 16

NOTE: This schematic is for all Canadian vehicles (with C200 C200 C200 C200 C200 A C D E B F or without the Cummins ISB4 C200 diesel engine). GROUNDING HEADLAMP FEED CONNECTION

Aeromaster on Workhorse Chassis—Body Wiring Manual 35 12—Rear Light Wiring IL IL Standard (OPTION) (OPTION)

LEFT LEFT

LIGHT LIGHT LIGHT LIGHT LIGHT LIGHT PLATE PLATE RIGHT RIGHT LICENSE LICENSE BACK-UP BACK-UP TA STOP/TURN/ TA STOP/TURN/ LIGHT LIGHT LICENSE PLATE LICENSE PLATE A B C A B C C B A C A B A A C622 C621 C620 C637 C637 C637 C638 C638 C636 C636 C635 C635 C635 C623 Rear Light Wiring Std - Diagram 58231008a Sheet 19 500 BK 18 500 BK 18 230 BR 18 238 GY 18 238 GY 230 BR 18 232 GY 18 232 GY 230 BR 18 500 BK 18 236 LG 18 230 BR 18 230 BR 18 236 LG 18 500 BK 18 230 BR 18 ANDARD ST - 232 GY 18 232 GY 238 GY 18 238 GY 236 LG 18 230 BR 18 500 BK 18 500 BK 18 230 BR 18 236 LG 18

C632 C632 C632 C632 C634 C634 C634 C634 A C B E E B C A WIRING

C631 C631 C631 C631 C631 C633 C633 C633 C633 C633 D D A C B E E B C A REAR LIGHT 18 234 RD 18 236 LG 18 230 BR 18 500 BK 18 232 DG 18 238 Y L 238 500 BK 18 230 BR 18 236 LG 18 234 RD 18

500 BK 18

500 BK 18 BK 500 230 BR 18 BR 230 ALARM BACK-UP (OPTION) S 18 (I.E., KIDNEY 500 BK 16 238 Y L 238 236 LG 16 230 BR 16 234 RD 16 232 DG 18

C610 C610 C610 C610 C610 B G A F C RAIL FRAME GROUND TO WHEN REAR LIGHTING IS LOCATED METAL).

USED OUTSIDE THE KICKPLATE AREA THE KICKPLATE OUTSIDE OR SIDE OR LICENSE PLATE WIRING CONNECTORS 620 & 621 WIRING CONNECTORS LICENSE PLATE ARE REAR LIGHT REAR FEED CONNECTION

36 Aeromaster on Workhorse Chassis—Body Wiring Manual IL 12—Rear Light Wiring IL LEFT LEFT LAMP LAMP LAMP LAMP RIGHT RIGHT BACK-UP Routed through Interior BACK-UP TA STOP/TURN/ TA STOP/TURN/ hru Interior - Diagram 58231008a Sheet 20 T C A B C C B A C B B C637 C637 C637 C638 C638 C636 C636 C635 C635 C635 Lamps Rear 500 BK 18 500 BK 18 238 YL 18 YL 238 232 DG 18 230 BR 18 500 BK 18 236 LG 18 236 LG 18 500 BK 18 230 BR 18 CHMSL LAMP CHMSL (OPTIONAL) 238 YL 18 YL 238 500 BK 18 230 BR 18 236 LG 18 236 LG 18 230 BR 18 500 BK 18 232 DG 18 234 RD 16 C621 HARNESS CHASSIS IP HIGH MOUNT

LICENSE PLATE 230 BR 16 IN KICK PLATE LICENSE PLATE LOCATED LICENSE PLATE C620 238 YL 18 YL 238 236 LG 16 230 BR 16 234 RD 16 232 DG 18 230 BR 16 500 BK 16 H G F E D C B A 1 REAR LAMP WIRING (ROUTED THROUGH INTERIOR) WIRING (ROUTED REAR LAMP 2 3 6 5 4 P N M L K J CONNECTOR CHASSIS COWL SWITCH L 18 L TRANSMISSION 500 BK 238 Y 236 LG 16 230 BR 16 234 RD 16 232 DG 18 19 DG 9 BR 18 YL 18 500 BK 18 C413 C419 C419 C419 C419 C419 13 2 5 3 6 BODY 236 LG 16 GROUND TO C418 C418 C418 C418 C412 C418 2 5 3 6 13 11 C101 SEE SHMSL OO C100 232 DG 16 232 DG 16 238 YL 16 YL 238 230 BR 16 500 BK 16 234 RD 16 230 BR 16 236 LG 16 238 YL 16 YL 238 GROUND

Aeromaster on Workhorse Chassis—Body Wiring Manual 37 12—Rear Light Wiring Split Taillights IL IL LAMP LEFT LAMP RIGHT LEFT LAMP LAMP LAMP LAMP PLATE PLATE RIGHT LAMP(OPTIONAL) LAMP(OPTIONAL) TURN LAMP TA STOP/ BACK-UP LICENSE * LICENSE PLATE * LICENSE PLATE LICENSE LEFT TURN LAMP BACK-UP RIGHT TA STOP/ A B C B A B B C A C A B A C A B A A C622 C621 C620 C636 C636 C638 C638 C642 C642 C641 C641 C637 C637 C637 C635 C635 C635 C623 Rear Lamp Wiring (Split Lights) - Diagram 58231008a Sheet 21 234 RD 18 500 BK 18 18 238 GY 236 LG 18 500 BK 18 236 LG 18 500 BK 18 500 BK 18 230 BR 18 18 232 GY 234 RD 18 230 BR 18 230 BR 18 500 BK 18 230 BR 18 230 BR 18 500 BK 18 230 BR 18 ) 234 RD 18 232 GY 18 232 GY 238 GY 18 238 GY 234 RD 18 500 BK 18 230 BR 18 236 LG 18 236 LG 18 230 BR 18 500 BK 18 C632 C632 C632 C632 C632 C634 C634 C634 C634 C634 D A C B E E D B C A AILLIGHTS T C633 C633 C633 C633 C633 C631 C631 C631 C631 C631 D E D B C A A C B E WIRING (SPLIT WIRING

238 GY 18 238 GY 234 RD 18 500 BK 18 230 BR 18 236 LG 18 234 RD 18 236 LG 18 230 BR 18 500 BK 18 232 DG 18 REAR LAMP REAR 500 BK 18 ALARM BACK-UP (OPTION) THE STOP

, 500 BK 16 KIDNEYS , 238 YL 18 YL 238 236 LG 16 230 BR 16 234 RD 16 232 DG 18 THE STEERING T (I.E. A RAIL FRAME GROUND C610 C610 C610 C610 C610 B G A F C TO . THE STOP LAMP SPLI T THE STOP TO FLASHERS FROM THE STOP LAMPS. THE STOP FLASHERS FROM CHASSIS Y REAR LAMP FEED CONNECTION 4- WA LAMP FEED (WHITE WIRE #17) LAMP COLUMN HAS BEEN CUT AND TAPED BACK ON THE BACK ON TAPED AND COLUMN HAS BEEN CUT ALSO SEPARATES THIS SYSTEM CHASSIS HARNESS. OR SIDEMETAL) IN ORDER LAMPS TURN SIGNAL THE OFF OF CIRCUIT 620 & 621 WIRING CONNECTORS LICENSE PLATE ARE UTILIZED WHEN REAR LIGHTING IS LOCATED AREA THE KICKPLATE OUTSIDE

38 Aeromaster on Workhorse Chassis—Body Wiring Manual 12—Rear Light Wiring Split Taillights Routed through Interior IL IL LEFT LEFT LEFT LAMP LAMP LAMP LAMP LAMP LAMP TURN TURN RIGHT RIGHT RIGHT BACK-UP BACK-UP TA STOP/ TA STOP/ B C A B C B A C B B C A B A C637 C637 C637 C636 C636 C635 C635 C635 C642 C642 C641 C641 C638 C638 230 BR 18 500 BK 18 500 BK 18 230 BR 18 236 LG 18 500 BK 18 234 RD 18 500 BK 18 18 YL 238 236 LG 18 232 DG 18 500 BK 18 234 RD 18 500 BK 18 Rear Lamp Wiring Interior Split Lights - Diagram 58231008a Sheet 22 THE STEERING AILLIGHTS AT T THE STOP LAMP SPLI T THE STOP TO FLASHERS FROM THE STOP LAMPS. THE STOP FLASHERS FROM Y IN ORDER THE BACK ON TAPED AND COLUMN HAS BEEN CUT ALSO SEPARATES THIS SYSTEM CHASSIS HARNESS. 4- WA CIRCUIT OFF OF THE TURN SIGNAL LAMPS, THE STOP LAMPS, TURN SIGNAL THE OFF OF CIRCUIT FEED (WHITE WIRE #17) LAMP 500 BK 18 230 BR 18 236 LG 18 234 RD 18 236 LG 18 230 BR 18 500 BK 18 232 DG 18 238 YL 18 YL 238 234 RD 18 CHASSIS IP HARNESS IP C621 HIGH MOUNT E LICENSE PLATE 18 L WIRING ROUTED THROUGH INTERIOR -SPLIT INTERIOR THROUGH ROUTED WIRING IN KICK PL AT

238 Y 236 LG 16 230 BR 16 234 RD 16 232 DG 18 CONNECTOR C620

230 BR 16 CHASSIS COWL 230 BR 16 500 BK 16 LICENSE PLATE LOCATED LICENSE PLATE

234 RD 16 H G F E D C B A 1 2 3 (OPTION) 6 SHMSL LAMP SHMSL 5 REAR LAMP REAR 4 P N M L K J SWITCH TRANSMISSION 19 DG 9 BR 18 YL 18 L 18 L 500 BK 238 Y 236 LG 16 230 BR 16 234 RD 16 232 DG 18 236 LG 16 C413 C419 C419 C419 C419 C419 13 2 5 3 6 500 BK 18 C101 SHMSL RAIL FRAME C418 C418 C418 C418 C412 C418 2 5 3 6 13 11 GROUND TO OO C100 230 BR 16 232 DG 16 230 BR 16 232 DG 16 500 BK 16 238 YL 16 YL 238 236 LG 16 234 RD 16 238 YL 16 YL 238 GROUND

Aeromaster on Workhorse Chassis—Body Wiring Manual 39 13—Roof Wiring AJAR DOOR SWITCH (OPTION) LIGHTS REAR I.D. LIGHT SHMSL (OPTION) CLOSED) Y REAR REAR LIGHTS LIGHTS CLEARANCE CLEARANCE (NORMAL

Roof Wiring - Diagram 58231008a Sheet 23

231 BR/WT 16 BR/WT 231

234 RD 18 RD 234

350 BK/PK 18 BK/PK 350

L/BK 16 L/BK Y 220

L 16 L Y 220 2 8 3 ON/OFF 7 LIGHT LIGHT CARGO CARGO REAR CARGO SWITCH

(STANDARD UNIT) (STANDARD 520 BK 16 BK 520 N

FA CAB DASH 16 DB 200 LIGHT (OPTION) TYPICAL ROOF WIRING TYPICAL 255 OR 16 257 RD 16 200 DB 16 520 BK 16 234 RD 16 220 YL/BK 16 220 350 BK/PK 16 231 BR/WT 16 231 BR/WT 16 231 BR/WT 8 4 5 7 A 9 2 13 6 C413 C413 C415 C413 C413 C413 C413 C413 C413 HARNESS QTR POST FRONT LIGHTS LIGHTS LIGHTS FRONT I.D. FRONT I.D. FRONT CLEARANCE

40 Aeromaster on Workhorse Chassis—Body Wiring Manual 14—Clearance Lights LIGHT SIGNAL POWER CLEARANCE DISTRIBUTION Clearance Lights - Diagram 58231008a Sheet 24 231 BR/WT 18 231 BR/WT 170 RD 14 5 C112 5 C113 231 BR/WT 18 231 BR/WT 85

231 BR/WT 14 87 30 87a 86 C410 CLEARANCE LIGHTS 66 C411 500 BK 18 231 BR/WT 14 231 BR/WT GROUND A 6 C414 C412 ROOF WIRING ROOF WIRING

Aeromaster on Workhorse Chassis—Body Wiring Manual 41 15—Panel Lights (HVAC Control Panel) GROUND GROUND 530 BK 18 Panel Lamps - Diagram 58231008a Sheet 25 4

500 BK 18 C330 4 C331 7 7 7 C303 C301 C302 (AUX. SW #3) (AUX. SW #2) (AUX. SW #1) PANEL HVAC ILLUMINATION 8 8 8 C303 C302 C301 3 C331 3 C330 280 LB/RD 18 280 LB/RD 18 280 LB/RD 18 PANEL LAMPS PANEL 4 C113 4 C112 280 LB/RD 18 PANEL LAMPS PANEL

42 Aeromaster on Workhorse Chassis—Body Wiring Manual 16—Stereo System SPKR SPKR RIGHT RIGHT GY DG BK BK/WT Stereo Sys - Diagram 58231008a Sheet 26 STD OPT STEREO STEREO RD RD YL PK/BK DB WT BK 10 15 10 15 BK/WT C413 C413 C413 BK BK LEFT SPKR LEFT SPKR 10 15 C412 C412 C413 150 RD 16 180 PK/BK 18 10 15 C411 C411 STEREO SYSTEM WIRING 10 15 C410 C410 180 PK 16 150 RD 16 2 9 C 111 C113 2 9 X U A B C C110 C112 TURN GRY GRY FLASHER 25 30A PWR 20A 15A WIPER ECM-BAT ENG-BAT RED RED RED PWR GRN GRN GRN HTR 5A 25A HTR 15A 15A 1-3 30A AUX. TURN-BU INST-LPS FUSE/PLR BRN BRN BRN IGN 180 PK 16 WHT BLU BLU 20A 10A 20A 20A 10A ECM-1 ENG-1 TRANS GAUGES ACC-RADIO WHT ACC WHT WHT 150 RD 14 CHASSIS FUSE BLOCK 15 15A 20A IL LPS IL HORN/DM STP/HZD BATT TA

Aeromaster on Workhorse Chassis—Body Wiring Manual 43 17—Door Ajar System POWER CHASSIS OEM SUPPLIED 12V Door Ajar - Diagram 58231008a Sheet 27 Door AJAR LIGHT DOOR A C661 350 BK/PK 18 9 C112 9 C113 350 BK/PK 18 DOOR AJAR DOOR C410 77 C411 350 BK/PK 18 C412 77 C413 350 BK 16 SWITCH

MAGNETIC 500 BK 18 BK 500

44 Aeromaster on Workhorse Chassis—Body Wiring Manual 18—Supplemental High Mount Stop Lamp (SHMSL) 8 18 ORAGNGE OEM STOP LAMP OEM FUSE SWITCH STP/HZD Supplemental High Mount Stop Lamp - Diagram 58231008a Sheet 2 A C645 234 RD 16 7 C112 7 C113 234 RD 16 13 C410 13 C411 SUPPLEMENTAL HIGH MOUNT STOP HIGH MOUNT SUPPLEMENTAL 234 RD 16 13 CLEARANCE LIGHTS C412 13 C413 REAR LAMPS 234 RD 16 LAMP SHMSL (OPTION)

Aeromaster on Workhorse Chassis—Body Wiring Manual 45 19—Accessory Outlet (Cigarette Lighter) OUTLET ACCESSORY Accessory Outlet - Diagram 58231008a Sheet 29 500 BK 16 OUTLET 130 RD 16 RY GROUND ACCESSO 11 C113 2 11 C112 C112 TURN FLASHER

130 RD 16 150 RD 14 150 RD 14 RD 150 CHASSIS FUSE BLOCK

46 Aeromaster on Workhorse Chassis—Body Wiring Manual 20—Cab Dome Light CAB LIGHT 520 BK 16 200 DB 16 Cab Dome Light - Diagram 58231008a Sheet 33 4 5 C413 C413 4 5 C412 C412 520 BK 16 200 DB 16 C411 C411 44 55 C410 C410 520 BK 16 200 DB 16 C 111 CAB DOME LAMP 11 77 C110 C 111 C110 520 BK 16 200 DB 16 G A C510 C510 TURN FLASHER GM ORANGE WIRE GM WHITE WIRE SWITCH CHASSIS HEADLAMP CHASSIS FUSE BLOCK

Aeromaster on Workhorse Chassis—Body Wiring Manual 47 21—Dash Fan N

M FA

DASH

OR RD Dash Fan - Diagram 58231008a Sheet 34 256 DG/WT 16 256 DG/WT 254 DG 16 8 9 C413 C413 Y DIFFER 412 8 9 C412 256 DG/WT 14 256 DG/WT 254 DG 14 N 1C 8 9 C411 C41 DASH FA N WIRE COLORS USED ON THIS OPTION MA WIRE COLORS USED ON BASED ON NUMBER OF OPTIONS ON THE UNIT BASED ON NUMBER OF OPTIONS FA 8 9 C410 C410 RED ORNGE C412 DARK GREEN/WHITE DARK GREEN 16511952a01 110 PK/BK 14 110 500 BK 18 280 LB/RD 18 321 987 12 15 11 14 456 10 13 256 DG/WT 14 256 DG/WT 254 DG 14 110 PK/BK 14 110 280 LB/RD 18 500 BK 18 GROUND 1 2 3 8 7 C302 C302 C302 C302 C302 1 1 8 2 8 2 3 ILLUMINATION POWER ILLUMINATION POWER DISTRIBUTION N DASH DASH FA SWITCH ON ON/OFF/ON (AUX. SW #2) 6 7

48 Aeromaster on Workhorse Chassis—Body Wiring Manual 22—Power Vent VENT M POWER Power Vent - Diagram 58231008a Sheet 35 Power Vent

254 DG 16 SWITCH #3 (C303) 9/ 11 RY C413 8 9 12 11 SWITCH FOR THIS OPTION, SWITCH FOR C412 C412 C412 C412 DIFFER RY IN USE, THEN AUXILIA THEN IN USE,

256 DG/WT 14 256 DG/WT 254 DG 14 258 LB/WT 14 258 LB/WT 257 LB 14 8 9 12 11 C411 C411 C411 POWER VENT SWITCH #2 (C302) IS THE PRIMA SWITCH #2 (C302) IS RY 8 9 12 11 C410 C410 C410 C410 C411 IF THIS SWITCH IS ALREADY THIS SWITCH IS IF

BUT WIRE COLORS USED ON THIS OPTION M AY WIRE COLORS USED ON THE SECONDA RY SWITCH. IS AUXILIA BASED ON NUMBER OF OPTIONS ON THE VEHICLE BASED ON NUMBER OF OPTIONS 150 RD 14 500 BK 18 280 LB/RD 18 110 PK/BK 14 110 500 BK 18 280 LB/RD 18 PRIMA RY SWITCH 256 DG/WT 14 256 DG/WT 254 DG 14 150 RD 14 280 LB/RD 18 500 BK 18 110 PK/BK 14 110 280 LB/RD 18 500 BK 18 258 LB/WT 14 258 LB/WT 257 LB 14 SECONDA RY SWITCH GROUND GROUND 8 7 1 2 3 1 2 3 8 7 ION POWER C303 C303 C303 C303 C303 C302 C302 C302 C302 C302 ION POWER 8 2 8 2 8 2 8 2 3 3 ILLUMIN AT POWER DISTRIBUTION ILLUMIN AT POWER DISTRIBUTION DASH DASH ON/OFF ON/OFF SWITCH ON SWITCH ON (AUX. SW #3) (AUX. SW #2) POWER VENT POWER VENT 6 6 7 7

Aeromaster on Workhorse Chassis—Body Wiring Manual 49 23—Heated Mirrors RIGHT HEATED MIRROR Heated Mirrors - Diagram 58231008a Sheet 36 500 BK 16 254 DG 16 SWITCH #3 (C303) RY SWITCH FOR THIS OPTION, SWITCH FOR 500 BK 16 500 BK 16 254 DG 16 RY THEN AUXILIA THEN IN USE, LEFT HEATED MIRRORS HEATED HEATED MIRROR ALREADY GROUND 254 DG 16 SWITCH #2 (C302) IS THE PRIMA SWITCH #2 (C302) IS RY 9/12 C411 IF THIS SWITCH IS IF IS THE SECONDA RY SWITCH. IS AUXILIA BUT 8 9 12 11 C410 C410 C410 C410 500 BK 18 280 LB/RD 18 110 PK/BK 14 110 150 RD 14 500 BK 18 280 LB/RD 18 PRIMA RY SWITCH 280 LB/RD 18 500 BK 18 256 DG/WT 14 256 DG/WT PK/BK 14 110 254 DG 14 150 RD 14 258 LB/WT 14 258 LB/WT 257 LB 14 280 LB/RD 18 500 BK 18 SECONDA RY SWITCH GROUND GROUND 8 7 1 2 3 1 2 3 8 7 C302 C302 C302 C302 C302 C303 C303 C303 C303 C303 8 2 8 2 8 2 8 2 3 3 ILLUMINATION POWER ILLUMINATION POWER DISTRIBUTION ILLUMINATION POWER ILLUMINATION POWER DISTRIBUTION DASH DASH ON/OFF ON/OFF SWITCH ON SWITCH ON (AUX. SW #3) (AUX. SW #2) HEATED MIRROR HEATED HEATED MIRROR HEATED 6 6 7 7 50 Aeromaster on Workhorse Chassis—Body Wiring Manual 24—Auxiliary Heater T S FEET HEATER AUXILIARY LOCATED IN LOCATED CAB ARE A CAB DRIVER B D A C340 C340 C340 Aux Heater - Diagram 58231008a Sheet 37 500 BK 14 GROUND 256 RD 14 14 YL 254 AUXILIA RY HEATER U V C101 C101 U V C100 C100 500 BK 18 280 LB/RD 18 110 PK/BK 14 110 PRIMA RY SWITCH 280 LB/RD 18 500 BK 18 253 DB/WT 14 253 DB/WT PK/BK 14 110 254 DB 14 GROUND 1 2 3 8 7 C304 C304 C304 C304 C304 8 2 8 2 1 3 POWER DISTRIBUTION POWER DISTRIBUTION DASH SWITCH ON ON/OFF/ON (AUX. SW #2) AUX HEATER 6 7

Aeromaster on Workhorse Chassis—Body Wiring Manual 51 25—Spotlight or Strobe Light LIGHT Spot/Strobe Light - Diagram 58231008a Sheet 38 SWITCH #3 (C303) 254 DG 16 RY SWITCH FOR THIS OPTION, SWITCH FOR 9/ 11 C413 DIFFER RY 12 11 8 9 C412 C412 C412 C412 IN USE, THEN AUXILIA THEN IN USE,

258 LB/WT 14 258 LB/WT 257 LB 14 256 DG/WT 14 256 DG/WT 254 DG 14 SWITCH #2 (C302) IS THE PRIMA SWITCH #2 (C302) IS RY 12 11 8 9 IF THIS SWITCH IS ALREADY THIS SWITCH IS IF

C411 C411 C411 WIRE COLORS USED ON THIS OPTION M AY WIRE COLORS USED ON THE VEHICLE BASED ON NUMBER OF OPTIONS BUT THE SECONDA RY SWITCH. IS AUXILIA 12 11 8 9 C410 C410 C411 C410 C410 SPOTLIGHT/STROBE LIGHTS 0 PK/BK 14 150 RD 14 11 500 BK 18 280 LB/RD 18 500 BK 18 280 LB/RD 18 0 PK/BK 14 PRIMA RY SWITCH 256 DG/WT 14 256 DG/WT 254 DG 14 150 RD 14 258 LB/WT 14 258 LB/WT 257 LB 14 11 280 LB/RD 18 500 BK 18 280 LB/RD 18 500 BK 18 SECONDA RY SWITCH GROUND GROUND 1 2 3 1 2 3 8 7 8 7 C303 C303 C303 C303 C303 C302 C302 C302 C302 C302 8 2 8 2 8 2 8 2 3 3 POWER DISTRIBUTION POWER DISTRIBUTION POWER DISTRIBUTION POWER DISTRIBUTION DASH DASH ON/OFF ON/OFF SPOTLIGHT SWITCH ON SPOTLIGHT SWITCH ON (AUX. SW #3) (AUX. SW #2) 6 6 7 7

52 Aeromaster on Workhorse Chassis—Body Wiring Manual F Index Fan, dash 40, 48 Federal Certification Label 7 Finding information 7 G Glossary of terms 10 A GM and GMC chassis 6, 10 A/C. See HVAC Grounding system 20 Accessory outlet 46 H Address National Highway Traffic Safety Administration Harness layout 18 9 Heated mirrors 50 U.S. Department of Transportation 9 Heater 10. See also HVAC Utilimaster Auxiliary 51 Customer Service 10 System (no A/C) 27, 28 Technical Publications 3 HVAC 29, 30, 31. See also Heater Air conditioning. See HVAC L Alarm, back-up 36, 38 Auxiliary heater. See Heater Light Back-up 36, 37, 38, 39 B Cab 40 Back-up. See Alarm and Light Cargo 23, 24, 40, 47 Battery 9 Center High Mount Stop Light Body serial number 7 (CHMSL). See Light: Supplemental Bumpers 10 High Mount Stop Light Clearance 40, 41 C Daytime running (DRL) 34, 35 Chevrolet chassis 6, 10 Forward 35 CHMSL (Center High Mount Stop Light). See Front 32, 33, 34 Light: Supplemental High Mount Stop Light Head light 32, 33, 34, 35 Cigarette lighter. See Accessory outlet License plate 36, 37, 38, 39 Color code 11 Master three-way switch 22, 23, 24, 47 Connectors 12, 13, 14, 15, 16, 17, 18 Panel 42 Cummins diesel 6, 14, 15, 16, 17, 25, 32 Rear 36, 37, 38, 39 Cummins diesel ISB4 12 Roof 40 Customer service 10 Side marker 32, 33, 34, 35 Spot 52 D Stop 36, 37, 38, 39 Door ajar system 44 Strobe 52 DRL 34, 35 Supplemental High Mount Stop Light 40 Tail 36, 37, 38, 39 E Turn signal 32, 33, 34, 35, 36, 37, 38 Electrical components 10 M Email 10 Mirrors, heated 50

Aeromaster on Workhorse Chassis—Body Wiring Manual 53 N U Numbers Unit serial number 7 Body serial number 7 Utilimaster Body Parts Manual 10 Index 7 Utilimaster body serial number 7 Phone 9, 10 Utilimaster Body Service Manual 10 Section 7 Utilimaster Glossary of Terms 10 VIN 7 Utilimaster Quick Reference Parts Guide 10 O V Outlet. See Accessory outlet VACS 6 P Vent, powered 49 Parts VIN 7 Guide 10 W Manual 10 Phone numbers 9, 10 Web site 3, 10 Power distribution 19 Wiper system 10 Intermittent 26 R Standard 25 Revision 3 Workhorse chassis 6, 10 S Safety 8, 9 Sections 7 Service manual 10 Spotlight 52 Stereo system 43 Strobe light 52 Switches A/C 29, 30, 31 Auxiliary 21 Auxiliary heater 51 Blower 27, 28, 29, 30, 31 Dash 48 Heated mirror 50 Hi/Lo (A/C) 29, 30, 31 Master light switch 21 Master three-way (cargo) 23, 24, 47 Power vent 49 Spotlight 52 Strobe 52 Thermo (A/C) 29, 30, 31

54 Aeromaster on Workhorse Chassis—Body Wiring Manual Utilimaster Body Wiring Manual Aeromaster on Workhorse Chassis Corp., 603 Earthway Blvd., Bristol, IN, 46507–9182 ® Part Number: 03102354-WY00EN © 2012, Utilimaster