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Old 07-21-2009, 14:32   #1 (permalink)
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AC Compressor/PCM/Shop Recomendation

2001 Navigator
Local mechanic tried and did not fix issue:
AC Compressor is not recieveing power, when power is given to the junction box it does then recieve power. I am thinking the PCM sector is shot. Any ideas? What may have caused the short? Also wouldn't the PCM give a code indicate the PCM is shot?

Has anyone tried replacing a PCM? Does it require any resetting?

Or a good recomended shop in Orlando would be appreciated?

Thanks.
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Old 07-22-2009, 11:03   #2 (permalink)
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Re: AC Compressor/PCM/Shop Recomendation

well the only thing you can check here, is your wiring and relays the rest is done with enhanced scaning, because there are several modules that require testing not only your PCM. And no it wont give any codes for that unles it were CAN protocol.
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Old 07-23-2009, 17:02   #3 (permalink)
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Re: AC Compressor/PCM/Shop Recomendation

It turns out according to the Lincoln Dealership it was a double issue:

A freon leak was caused by the AC Switch having grooves developed around the bolt portion - $500 for replacement. The EATC (AC Control Head) also doesn't work - $712 for the part - I declined and will install a used one. They also came up with a PCV Valve Line air leak ($320). This is something anyone can install upon further inspection.
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