wiring diagram

[virgilh]

i need the bulkhead wiring diagram for a 1974 chevy 3/4 ton 2wd pickup my neighbor yanked his apart and lost the harness i have a box full of harnesses and i need to see what colors are where on the diagram so i can give him the correct harness thanks

 

[pauly383]

drivers side is the light harness , should be the same for all the trucks in the 70's , with the rear length the only difference .

passengers side of the bulkhead is the engine harness , and most of the 70's rigs will interchange , although some options will change from rig to rig , the alternator and such should line right up and whats not used can be cut off or tucked into the loom .

The underhood a/c or heat comes through the big grommet in the firewall behind the motor , and it doesn't matter if its a 83 with a/c or a 74 with heat only , that one extension harness plugs right into the dash harness on the cab side of firewall by the radio opening .

I have wired a couple rigs with factory stuff

 

[virgilh]

cool ill give it a try with one of the dozens i have

 

[pauly383]

Now if you want actual diagrams go to dremu's site :

http://brochures.slosh.com/

there is a clicky to wiring from that page

70-78 shares the same diagram , although they went internally regged alt with the 73's