Engine Size: 6.2
I posted here about this truck a while back. http://www.autoacforum.com/messageview.cfm?catid=2.&threadid=18468 Put the new compressor and belt on and has been working good for nearly two weeks. Now it is blowing the compressor fuse as soon as the key is turned on. Does this mean something in the compressor clutch coil has shorted out? It blew the fuse once while I was charging it. Put in a new one and all was well until today. I checked the wires where they plug into the compressor and everything looked ok.
disconnect the compressor. See if the fuse holds. Check the clutch for short to ground.
Fuse didn't blow with compressor unplugged.
Guess I'll be putting another one on.
Thanks for the help.
Instead of wasting your time and someone else's money....returning a compressor that may not be defective...why not perform some diagnostic procedures...find out what the darn problem is.
Some of the GM compressors have a diode built into the wiring harness...perhaps...there is an issue with the diode....or with the vehicle wiring.
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Measure resistance of the clutch coil, if less than 3 ohms the coil is shorted. And like Dougflas said, if it's a 2 wire coil, check for ground fault. Neither terminal of a 2 wire coil should have a path to ground with the harness unplugged from it.
Thanks for all the help. I will check it with an ohm meter in the morning.
There was a direct short from compressor terminals to ground. After I got the compressor off I found the problem. There is a small bracket that holds the wires down on the compressor. It was so tight it cut throught the insulation. Replacement compressor is on and all is well again.
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