Check fuse F1.2, F2.2, F2.24, and F2.34.
F1=BJB=battery junction box (engine bay)
F2=CJB=central junction box (driver's kick panel)
The CCRM is located in the front right hand fender well. Remove the tire and plastic liner to get access.
Test CCRM pin 12 (RD) for +12 volts (key on).
Test CCRM pin 21 (DG/OG) for +12 volts.
Inject +12 volts to CCRM pin 23 BK/YE, does the AC clutch engage?
Ground CCRM pin 22 (PK/YE) does the CCRM relay click and/or the AC clutch pull in?
The results above will narrow down the issue.
Please review diagram 54-3
This thread has been very helpful, thanks!
2001 GT, system never was touched since new. When I was driving, the air became warm and I recycled the switch off then on...that worked a couple times but only for a minute or so. I thought I was riding the low pressure switch since I had never added freon to the car ever. The low side pressure was around 25 psi and I charged it back up to 45. The car blew cold for a few days then once again it started blowing warming.
My A/C works great when 12v is applied to the compressor clutch...cold air and normal pressures. The low side pressure is still 45 psi
On my car I'm getting 12v with the key at RUN on pin 12 when the connector is attached to the CCRM.
I do have 12v on pin 21.
I injected 12v to pin 23 and heard a loud clunk.
jumping the low pressure switch does not engage the clutch.
I do get 12v at the high pressure switch.
All fuses have been checked.
Selecting A/C on the dashboard sends 12v to the low pressure switch and 0v when not selected.
I didn't test the low pressure switch since jumping the switch yielding no change.
Any ideas?
Also, it seems like there are a lot of different part numbers for the CCRM's. Mine is B 1R3F-12B581-AA Service P/N 1R3F-12B577-AA. Are they all the same?
Thanks
