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Old 07-16-2011, 11:56 AM   #1
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Air Conditioning Help! 01 Mustang GT 'Vert

My A/C system is not working, Wednesday it blew ice cold like always and Thursday nothing. When i turn on the A/C the fan comes on like it should but the compressor clutch is not engaging at all. I hooked up a A/C manifold and i am getting about 110psi of static pressure (89 deg. ambient air) so i know there is still a charge in the system. I checked the fuses and jumped the low pressure switch with a paper clip and still no luck. What other item can I check? I live in near Phoenix and July is not the time to lose A/C!!!!!!!!!!!!
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Old 07-16-2011, 02:17 PM   #2
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Good possibility its ccrm
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Old 07-18-2011, 03:48 PM   #3
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How do I test the ccrm? If the fan kicks on when the knob is turned to "a/c" wouldn't that mean the curcuit is working?
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Old 07-18-2011, 06:15 PM   #4
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Fan has its own relay so no not really. Best thing to do is trace wiring back and see where you have power. Try to give compressor power and see if it cools and what the pressures are. The ccrm is a common problem though. Its hard for me to tell people how to diagnose ac and elec problems from home without proper tools that i am used to using
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Old 07-18-2011, 10:07 PM   #5
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I unplugged the two wire connector from the compressor and I am getting around 13.8v when I turn the a/c on. Would this indicate that the electromagnet that engages the clutch could be bad? The a/c was working on and off before it finally gave out.
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Old 07-18-2011, 10:37 PM   #6
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Re: Air Conditioning Help! 01 Mustang GT 'Vert

Does anyone know if I can test the clutch coil by testing resistance? If so what should that resistance be?
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Old 07-19-2011, 01:50 AM   #7
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How's the compressor?
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Old 07-19-2011, 06:25 AM   #8
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It never made any noise before it quit and I can turn it by hand without any problems.
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Old 07-19-2011, 06:55 AM   #9
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If you have power at the compressor then its compressor. If you cant hear it click at all there is no saving it.
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Old 07-20-2011, 08:37 AM   #10
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I am pretty sure the problem is the ccrm. If I jump power to the compressor it turns on and I get cold air. I talked to a mechanic and her said there could be voltage passing through the relay but not enough current to start the compressor if the relay is bad.

Does anyone know where I can find a wiring diagram for the ccrm? I have seen a few on the internet but none for a 2001 Mustang GT, only for other years of Mustangs. If someone knows what year ranges have the same ccrm that would be helpful too.
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Old 07-22-2011, 01:59 AM   #11
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Quote:
Originally Posted by metalplatesrule
I am pretty sure the problem is the ccrm. If I jump power to the compressor it turns on and I get cold air. I talked to a mechanic and her said there could be voltage passing through the relay but not enough current to start the compressor if the relay is bad.

Does anyone know where I can find a wiring diagram for the ccrm? I have seen a few on the internet but none for a 2001 Mustang GT, only for other years of Mustangs. If someone knows what year ranges have the same ccrm that would be helpful too.
Anyone from 99-04 would match. No internals changed. Same car.
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