I have a 2000 GT. My A/C has stopped blowing cold air. I noticed that the compressor clutch does not spin at all when the A/C is on. After some research, I thought that I may be low on refrigerant. I purchased a recharge bottle (with a gauge), and when I checked the low side pressure, it was reading about 125 psi (it is 90 degrees today, if that matters). I therefore assumed that a recharge was not necessary, so I began to investigate further.
I decided to work backwards from the compressor. With the car running and A/C on Max and top speed, I disconnected the A/C clutch field coil connector on the compressor. I checked for voltage from the BLK/YEL wire to a ground and saw nothing.
I then disconnected the A/C high pressure cut-out switch (near the top of the radiator). I checked for voltage from the DK BLU/YEL wire in the connector to a ground and got ~14V.
I then jumpered the DK BLU/YEL wire in the connector to the DK GRN/ORG wire in the connector and checked for voltage again on the A/C clutch field coil connector on the compressor and saw nothing.
So, it seems that problem lies after the high pressure cutout switch and before the compressor itself. If the high pressure switch was bad, I would have seen ~14V at the clutch field coil connector when I jumpered the high pressure connector.
According to the wiring diagram, signs are pointing to the CCRM. Honestly, I do not even know where the CCRM is right now. I have to research a bit more.
Is my diagnosis correct so far? Is there a way to test the CCRM? Am I missing anything? Your help is appreciated! It was hot today!
I decided to work backwards from the compressor. With the car running and A/C on Max and top speed, I disconnected the A/C clutch field coil connector on the compressor. I checked for voltage from the BLK/YEL wire to a ground and saw nothing.
I then disconnected the A/C high pressure cut-out switch (near the top of the radiator). I checked for voltage from the DK BLU/YEL wire in the connector to a ground and got ~14V.
I then jumpered the DK BLU/YEL wire in the connector to the DK GRN/ORG wire in the connector and checked for voltage again on the A/C clutch field coil connector on the compressor and saw nothing.
So, it seems that problem lies after the high pressure cutout switch and before the compressor itself. If the high pressure switch was bad, I would have seen ~14V at the clutch field coil connector when I jumpered the high pressure connector.
According to the wiring diagram, signs are pointing to the CCRM. Honestly, I do not even know where the CCRM is right now. I have to research a bit more.
Is my diagnosis correct so far? Is there a way to test the CCRM? Am I missing anything? Your help is appreciated! It was hot today!