I know there is a diagram for the 91.5 on here, but there are differences between the 91 and 93 model years in the wiring looms.
Does anyone have a wiring schematic for a 93??????

 

i think i might have one in my fsm i will have to did it out any specific part ya looking for ?


Jason

 

The '91.5 trucks are different than everything else when it comes to engine/drivetrain related wiring.

What in particular were you looking for?

 

I am having some ground problems I think.. effecting the fuel guage, tail lights and such, i'd like to find a copy of the full schematic similar to the one that is on here for the 91.5's.

Replaced both RR lamp sockets and brake, tail/turn and back-up lamps worked fine. Installed new trailer plugs, checked everything while hooked up to the trailer, everything worked great. Unhooked the trailer and pulled into teh garage and lost the left rear turn signal, and have a weak current to teh back up lights when running lights are on. back up lights are coming on with brake lights.
At some point there was alot of splicing done into the harness for the RR lamps sockets and I have traced teh wiring back to the first plug, replaceing the bad sections of wire. I am certain that I probably have a short to teh ground some where, but cant find the ground points for the lighting harness.

Also trying to locate the ground points under the hood. There is the main battery cable ground to the block, the battery to core support ground, and it seems there should be a ground from teh firewall to the block, but I cant find it....

 

Anybody help me on this?????????

stillhaevnt been able to find the problem.
I bought one of the Hoppe trailer plug kits that plug into the wiring harness, nad if I unhook it, everythings wroks fine, so I amsure the problem is in my trailer plug harness, but cant find it.....getting frustrated

 

OK got it figured I think.. and just if anyone else ever needs it...RR lamp wiring:
the black/red stripe= parking lamp( dimmer of the two filaments)
black/yellow stripe=turn and stop
violet=reverse lights
solid black is a common ground for both sockets.......