The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Wiring for Dummies -101 ... Need advice !!

**Jason Banks** · 12-12-2022, 01:47 PM

I want to add a little bit about the fans. Any of those relay setups I link will require the Blue and Green (Fan 1 and Fan 2 trigger wire) from the PSI harness, as well as switched power to function. I put my fan relays on the core support behind the battery. I don't believe there is a good location to get switched power in that area, so you need to extend it there from somewhere else. I picked mine up at the fuse box. Maybe the painless kit has a lead on the engine side you could use.

I extended switched power, the blue and green from the psi, and the blue wire from the Vintage Air Binary switch and the wiring for the Vintage Air heater valve up to below the battery tray and broke everything off from there.

12-12-2022, 01:47 PM	#10
Jason Banks Senior Member Join Date: Dec 1999 Location: TX Posts: 1,528	Re: Wiring for Dummies -101 ... Need advice !! I want to add a little bit about the fans. Any of those relay setups I link will require the Blue and Green (Fan 1 and Fan 2 trigger wire) from the PSI harness, as well as switched power to function. I put my fan relays on the core support behind the battery. I don't believe there is a good location to get switched power in that area, so you need to extend it there from somewhere else. I picked mine up at the fuse box. Maybe the painless kit has a lead on the engine side you could use. I extended switched power, the blue and green from the psi, and the blue wire from the Vintage Air Binary switch and the wiring for the Vintage Air heater valve up to below the battery tray and broke everything off from there.