Bad news. The compressor clutch relay ground control is through the PCM and since relay is not the fault, either the PCM is faulty or the wire from relay to PCM is shorted to ground.
Unplug PCM and Ac clutch relay and test the PCM terminal A17 ( RED wire ) for continuity to ground. If continuity exists, the wire is shorted to ground.
If no continuity exists, the PCM has to be substituted to test.
Thursday, September 17th, 2009 AT 10:30 AM