When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a '76 F-350 with a 390 engine. I am working on figuring out the wiring in the engine bay and discovered that I had my oil pressure sensor wire plugged into the wire coming from the AC Compressor/AC clutch. However, now I have absolutely no idea what the wire coming from the AC Compressor is supposed to plug into. Any help or guidance would be much appreciated. I have been searching online and looking through wiring diagrams for days now and have found little to nothing.
I don't know if this helps, but I just installed an aftermarket system. There was one wire that went from the condenser to the heat exchanger, and from the heat exchanger to the controls inside the truck. There was only this one wire coming out the condenser.
On my '77 the compressor clutch wire is black and leads back eventually to the "de-icing" switch inside the housing, it has a connecter in the housing, and there's one out there under the hood near the compressor. I did add a under dash mounted "toggle switch with light - leg" in between the two connecters so that I can flip the compressor on while in defrost mode for faster defrost, was surprised long ago that the system didn't do it automaticaly but it doesn't. OEM just blows heated air on the windshield.
I take it you're looking for the wire to plug into your compressor ? if so it'll be in the harness that goes down the top of the engine. you can just find it and plug it in.
if it's not there then you'll have to find it at the firewall .
I don't know if this helps, but I just installed an aftermarket system. There was one wire that went from the condenser to the heat exchanger, and from the heat exchanger to the controls inside the truck. There was only this one wire coming out the condenser.
You must mean from compressor to evaporator to controls? The condenser is in front of the radiator and the "heat exchanger" inside is the evaporator. There shouldn't be a wire from in front of the radiator.
Originally Posted by tbear853
so that I can flip the compressor on while in defrost mode for faster defrost, was surprised long ago that the system didn't do it automatically but it doesn't. OEM just blows heated air on the windshield.
I was surprised too. I was actually able to modify the controls so it engages in defrost mode. I had to grind back the ramp that moves the microswitch.
