The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - need help finding a/c compressor wires on 85 GMC

72farmer · 02-03-2018, 03:17 PM

I have a 85 GMC Sierra Classic.I am going to try to get the a/c going.I can't seem to find the wire going to the compressor.The compressor has 2 wire terminals on it.I thought most older vehicles that had a/c on them only had 1 wire to compressor.The negitive ground was done through engine ground and mount.

I need to know what color wire or wires would come from pressure switch and go to the compressor.

02-03-2018, 03:17 PM	#1
72farmer Registered User Join Date: May 2009 Location: Hazel Green AL Posts: 286	need help finding a/c compressor wires on 85 GMC I have a 85 GMC Sierra Classic.I am going to try to get the a/c going.I can't seem to find the wire going to the compressor.The compressor has 2 wire terminals on it.I thought most older vehicles that had a/c on them only had 1 wire to compressor.The negitive ground was done through engine ground and mount. I need to know what color wire or wires would come from pressure switch and go to the compressor. Last edited by 72farmer; 02-03-2018 at 03:34 PM.