Hello, My firebird recently got an engine swap and after my compressor won't come on. I'm pretty good w/electrical so I checked the wiring diagrams.
1.A/c cruise fuse (under hood)-ok >2.swapped relays to be sure it wasn't that-ok >3.tested the dk grn/wht wire from the a/c control switch inside: turn on & get ac-12vlts, off-nada-so that's ok.
if you are facing the car from the front on the same side as the battery? I was thinking that the guy that installed my engine might have messed up something, but everything else works. I changed the compressor and found that the old one works. If I ground the dk grn/wht wire from the rely the compressor kicks on. Could the PCM be the source of my problems or should I try the wiring first. I have already tested a fair amount of wires for shorts and they all seem fine so far, but I haven't been though them all. (Got to Dark) lol. How do you bypass the a/c temp sensor to check, and the a/c pressure sensor to check it also?
Here is a link for the wiring diagram: