Okay so I am melting in this South Georgia heat.
My A/C was working fine, I stupidly decided to pull the A/C relay to troubleshoot a different problem I was having. After putting the relay back in, my A/C no longer worked, it only blows hot air. The blower works fine, everything switches over to various vents when I change the setting. The compressor just not engage when I turn it on.
CEL says "Open or shorted condition in the A/C clutch relay circuit."

I tried putting in a new relay from AZ, no change.

HELP!

 

Run a jumper from the battery to the compressor and see if it kicks on.

 

I'm sorry can you elaborate? I'm still learning

 

I'm having a problem with my AC compressor too.

My solution, obviously temporary, is to just roll all the windows down. Here in Florida, it's not exactly cool here either.

I'm just gonna drive up to a shop one of these days and have them replace it for me.

 

To keep this answer away: I recently drained and add r134a. It blew colder after that, then all my shenanigans broke something.

 

Bump

 

Is a pin on the relay or the socket for it messed up? If you only removed the relay I don't see what could have happened.

 

I'll check that out in the morning and get back. Do I just do a visual check?

 

Can someone tell me what fuses are associated with the AC system on a 92 4.0? I don't have a manual and would prefer not to buy one right now. All I can find is the blower fuse and the relay under the hood. Both are fine.

 

FIXED!

I don't know what THAT is, but I was messing around with connections trying to see if any were loose, and low and behold, that one was. As soon as I jiggled it, the compressor clicked on.



Thanks to the 3 people that helped

 

That's your low pressure switch...good catch easy fixes are the best...

 

Agreed!