97 Thunderbird AC problem

New member attempting to chase down a problem with the AC on my 97 T-bird. No power to AC clutch. Both pressure switches are OK, so have been attempting to chase down possible problem with CCRM or PCM. AC works great when 12 volts is jumped to the compressor clutch.
Would appreciate any advice from forum members.
Also, would like to know where the PCM is located in the vehicle.

Thanks

Welcome to the forum modifyit. It sounds like you may have a bad relay in the CCRM. Pin 21 in the CCRM connector is supplied 12V that goes through the two pressure switches to the AC clutch control relay. The wire connected to this pin is PK/LB. The other end of this wire is connected to pin 1 of the AC high pressure cutout/fan switch. If you have 12V here when the AC is turned on then the relay is bad and you will have to replace the CCRM.
The PCM is located behind the passenger side trim panel in front of the door and below the dash board.
FYI- Look at the second page of the tech help thread to see how to run a self-diagnostic test of the AC system.

Thanks for the reply. I had narrowed the problem down to the CCRM, but was looking for additional assurance before throwing a fairly expensive part at the problem and was hoping the PCM wasn't the cause. That would be throwing even more cash at it.
Thanks again and now I'm going to search for that tech help thread you mentioned.

It's the first thread on the main Thunderbird page.

Thanks, I found the troubleshooting link you referred to. I also might add that I did change the CCRM and the problem has been taken care of. When I purchased the replacement CCRM, since there was a core charge, I figured the part must be rebuildable, so I opened it up to find out what's inside the thing. Somewhere, I read about these things being rapairable if you can find a replacement for the bad relay inside. There are obviously several relays and related circuit board in the module, but I didn't see one that I thought would be easy to find a replacement for, so I shelved that idea. Thanks for the feedback.

You're wlcome. I've never gotten the chance to take apart a CCRM. Were there any numbers or names on the relays?

There were numbers on the relays, but I didn't record them. Not sure if there was a manufacturer name on them. There were three identical looking parts which I believe were the relays. They were about 1"X1"X1". The relays/or whatever they are were soldered to a circuit board and one other cube shaped part, about half the size of the other three was also soldered on there. This part had what looked to be a burnt or melted area along one side. So that might also have been a relay and possible the clutch relay. I understand that one of the relays is for the fuel pump. I suppose if you had two defunct CCRMs, you could take them apart and use a good relay from one to repair the other in an emergency. And if you were really stuck in the boondocks with say a bad fuel pump relay, you could get creative and swap the AC relay for the fuel pump relay provided you happened to have a soldering iron and a power source in the boondocks. All kind of possibilities.