CHEVROLET . GMC . LIGHT DUTY TRUCK . CK ST P & G-VAN . WIRING MANUAL . WIRING DIAGRAMS 1 ELECTRICAL CIRCUIT IDENTIFICATION FOR WIRING DIAGRAMS Circu it Number Circuit Color Circuit Name 2 Red Feed, Battery - Unfused 3 Pink Feed, Ign. Sw. "On & Crank". 73 Purple-White Feed, Blower Sw. "Medium 3" Controlled. 73-87chevytrucks.com » Technical Forum (Read Only) ». Wiring Manuals 1973 Chevy 1974 Chevy 1975 Chevy 1976 Chevy 1977 Chevy 1978 Chevy 1979 Chevy 1980 Chevy 1983 Chevy. link to Complete 73-87 Wiring Diagrams ( Haynes ) « Last Edit: August 05, 2019, 08:15:58 pm by bd »
Here are the complete wiring harness schematics for the 73-87 series pickups. These are HUGE jpgs so you may want to save them to your hard drive and print the pages you need. 73-76 diagrams 73-76 cab Interior 73-76 chassis rear Lighting (chassis/cab and Stepside 73-76 chassis rear Lighting (Fleetside and Suburban 73-76 engine and Front Lighting. Re: Complete 73-87 Wiring Diagrams added to the Technical board « Reply #6 on: May 26, 2009, 03:36:44 pm » You need to have the printer print to 8.5" x 11", I scanned them with high resolution so the detail wouldn't be fuzzy when printed.