AC problems
So I have an 02 GT that has had a motor built from ground up. But having problems with my AC because the clutch is not cycling like it should. But ran some test and found that the PCM is not sending a ground to the relay. So I am at the point of what tells the PCM to send a ground to the relay? Thanks for all the help in advance.
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I dont think the PCM has any thing to do with the AC. But the CCRM ( constant control relay module ). Also if the AC compressor clutch is cycling on and off it is because the refrigerant level is low. If it is not coming on at all and you know the system is full, there is a chance it is the low pressure control switch.
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Originally Posted by dawson1112
(Post 8651690)
I dont think the PCM has any thing to do with the AC. But the CCRM ( constant control relay module ). Also if the AC compressor clutch is cycling on and off it is because the refrigerant level is low. If it is not coming on at all and you know the system is full, there is a chance it is the low pressure control switch.
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Do you have a set of manifold gauges to see what the a/c system is doing?
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Yea put gauges on it and reads right no problems there. Just been stumped with how it is doing
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Originally Posted by Icemann185
(Post 8651711)
Yea put gauges on it and reads right no problems there. Just been stumped with how it is doing
It is also possible the AC relay is worn. When that happens the relay won't stay energized when it overheats and it will open the circuit (cutting power). Once it cools off it closes the circuit again. Maybe find a relay in the fuse area that is the same type and swap it temporarily. |
could be excessive air gap at the compressor clutch. over time they wear the material and that field coil is only so strong. when it stops "working" take a long metal something and ( CAREFULLY) see if the clutch is magnetized even if the compressor isnt spinning anymore. The system might be operating correctly minus the actual clutch being able to spin due to air gap.
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When my AC system was having a similar issue it was the relay. I replaced it and haven't given it another thought. Cheap and easy to try.
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well, the clutch is that part with the three steel bars which expand out when turning. They are engaged by an electromagnet which sits in the ac compressor. I took mine out on my 93 Tbird and it was a bitch to get it back in. but I did it.
I noticed my ac was turning off and on far more than usual, so I bought some freon on eBay and put in in the system, problem solved. Cold air. You could have a grounding problem ANYWHERE in the system as there's far more than one ground. Might do a check around see if any wires have corroded off where they used to be attached. Good luck amigo! |
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