Bare minimum wiring requirements 92 K2500 7.4L

[GreenBelair]

I am looking for either a replacement engine bay wiring harness or what the bare minimum is required for the ECM etc as I had an electrical fire at the rear of the engine. I want to just restore drivability currently no dash in the truck anymore. Where can I find what I need to replace to make it work or where I can find a plug and play harness.

 

[Erik the Awful]

If you get lucky at Pull-A-Part, you might find an intact 7.4 harness. Grab a spare harness off another GMT400 in case you need to make repairs or have some damaged connectors. I recently repaired the mouse-chewed dash harness and HVAC harness for my '89 with harnesses from a junkyard truck. Once I started I found a lot more needed repairs than I initially thought. I used half a bucket of heat-shrink butt splices and half a roll of Super33 electrical tape, but I powered the HVAC harness and controller up with a battery and it functioned fine.

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