Late 70's Truck Wiring advice
#1
Late 70's Truck Wiring advice
Hello!
I have 1977 C20 that I've been working on getting back on the road and It's in need of a new Wire harness. It's missing wires and has cuts and exposed wires everywhere. I've been tossing around the idea of building a whole new one from scratch or just buying a new one. I've found a few from Brothers, Summit Racing, American Autowire, and so on... But I stumbled across a 1978 C30 with a 454. The guy is offering a great deal on the whole wiring harness Cab, engine, and body wiring, the whole sha-bang. But I'm not sure if a '78 454 harness is compatible with my '77 C20 with a 350. If any one knows for sure or if it's even close to being usable, it would be appreciated!
Thanks!
-Cliff
I have 1977 C20 that I've been working on getting back on the road and It's in need of a new Wire harness. It's missing wires and has cuts and exposed wires everywhere. I've been tossing around the idea of building a whole new one from scratch or just buying a new one. I've found a few from Brothers, Summit Racing, American Autowire, and so on... But I stumbled across a 1978 C30 with a 454. The guy is offering a great deal on the whole wiring harness Cab, engine, and body wiring, the whole sha-bang. But I'm not sure if a '78 454 harness is compatible with my '77 C20 with a 350. If any one knows for sure or if it's even close to being usable, it would be appreciated!
Thanks!
-Cliff
#2
I'm here for the party
are you planning on using the 78 cab? if so theres nothing to worry about. if not the only issue is the bulkhead connector and even then i dont there there was any change till the 80s (81) but the color code for the wires is pretty much the same.
you can find the 73-87 wiring diagrams Here if you check here the 77-80s even use the same diagrams
and the 73-87 truck manuals Here
you can find the 73-87 wiring diagrams Here if you check here the 77-80s even use the same diagrams
and the 73-87 truck manuals Here