97 GMC K1500 XC A/C not working - electrical

[Scrat]

Yeah, I see what you are saying about the 3 diodes sparkydog. But this truck has a mechanical fan... no electrical fan for me. So that circuit is eliminated. That looks like the schematic I have. Thanks for posting it however.

One other thing, when i "jump" the AC relay, the compressor runs continuously, regardless of whether the AC is even "on" on the dash controls.

I'm still scratching my head on this but am starting to lean towards the AC control module, whatever, whereever that is lol.