Ac condenser fan

[57taskforce]

I was actually thinking along these lines as well, maybe the high side has two switches because when I jumped the switch on top of the compressor where the high side line exits the compressor it kicked the fan on but the compressor didn’t stop like I had expected it too. I had the grill out of it yesterday morning and didn’t see any other switches but it’s tight down on the passenger side of the inner fender and core support where the lines come thru to the condenser so I could have missed it.
I had mostly just assumed that the cycling switch and the aux fan both of which would be in the high side, were one in the same and the computer just did what it was programmed to do with the signals received from the switch. Maybe I’m wrong here.

After reading over the schematic above more, I’m a little confused. I definitely didn’t jump an engine temp switch, and it doesn’t show the high side pressure switch having anything to do with aux fan. I certainly did jump the high side switch.

And… in this case that particular high pressure switch would almost certainly have to be a normally open switch so when it hits the prescribed pressure it closes, completing the circuit to the computer or relay… unless the pcm is looking for a lost hot or ground reference I guess. Now I’m gonna have to see if the pigtail is hot or ground on one side just because I’m curious.