The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 72 Sierra Grande wiring

Bigblock50 · 10-10-2020, 09:42 PM

I hadn't focused on that part of the diagram ... perhaps not the best representation of a fused power connection. In any event, my HEI is connected to power by a single sliding connector at the end of a black wire. You have to remember, rewiring on my truck was done in a variety of wire colors having no relation to GMC diagrams. The substitute for the 12ga purple solenoid wire was a thin black wire about 18ga inserted into one of 3-4 aftermarket junction blocks.

In any event, today the truck cranked over fine and all electricals seemed OK. The new starter grinds a bit but that's an adjustment issue that I can sort out. I have a few leftover wires spliced together under the hood (yellow, blue, green) that I think are connections to trailer lights/signals. I'm abandoning the underbody trailer hitch wiring in place.

Like most long-time collectors, I've encountered many problems caused by shoddy work in the past. This pernicious job of rewiring takes the cake.

Thanks to all who have helped, most especially to LockDoc and Rusty Pile!

Bill in Luray

10-10-2020, 09:42 PM	#37
Bigblock50 Registered User Join Date: Aug 2020 Location: Luray, VA Posts: 35	Re: 72 Sierra Grande wiring - still at it I hadn't focused on that part of the diagram ... perhaps not the best representation of a fused power connection. In any event, my HEI is connected to power by a single sliding connector at the end of a black wire. You have to remember, rewiring on my truck was done in a variety of wire colors having no relation to GMC diagrams. The substitute for the 12ga purple solenoid wire was a thin black wire about 18ga inserted into one of 3-4 aftermarket junction blocks. In any event, today the truck cranked over fine and all electricals seemed OK. The new starter grinds a bit but that's an adjustment issue that I can sort out. I have a few leftover wires spliced together under the hood (yellow, blue, green) that I think are connections to trailer lights/signals. I'm abandoning the underbody trailer hitch wiring in place. Like most long-time collectors, I've encountered many problems caused by shoddy work in the past. This pernicious job of rewiring takes the cake. Thanks to all who have helped, most especially to LockDoc and Rusty Pile! Bill in Luray