AC Compressor Wiring

[scottp371]

I'm trying to get the AC going again on my '85 (it's been disconnected since I got it), but I'm stuck. I got a new pigtail for the compressor connection, but I have no idea what wires it hooks up to, and I'm completely illiterate with electrical diagrams. Can anyone show me where the wires connect to the harness? Thank you!

[Chuck W]

That should just be a ground and a signal from the A/C Clutch Cycling Pressure Switch (which is located on the AC drier at the firewall on the pass side).

[wraithracing]

I believe on the carbureted models you have the wiring coming from the accumulator going to the carburetor WOT cut off and then to the compressor itself. It's been awhile since I have seen a stock wiring, so my recollection may not be 100%. I know I used OEM wiring on my 79 PC when I converted it to A/C and the 5.0, I am pretty sure the wiring was not wrapped up inside the harness with other wiring, but essentially almost stand alone.

[scottp371]

Thank y’all very much. I’m digging through the wiring rats nest, but I think I’m on the right track.

[Bentley]

Buy the " Electrical & Vacuum trouble shooting guide" for your year car... I have one for my 83 and I use it all the time.... Should be one on Ebay...

My 83 had the " hot " wire come into the electrical connection that sits on the intake.
That wire went to the solenoid on the carb.. It turns on the solenoid for a faster idle when your AC is on....
Where the hot wire came into the connection it came back out ( two wires into the same spot) and went to the AC pressure switch on the accumulator..
THEN a wire came back from the AC pressure switch to the connector ( different spot on it) and that is the wire that goes to your compressor...
Hope my explanation makes sense.....

[teal95]

Abe books also has used books. I've gotten EVTMs and manuals from them.