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ok,
i checked and the 5 volts appears to be a reference voltage for the truck to check the status of the compressor
i have voltage all teh way out to the compressor. I pulled the bullet conector apart right before clutch and put 12volts on it and still nothing. I put my meter on it and was getting .1 ohms resistance to ground, so it looked like the coil was OK, but with power on it it would not pull in. I guess i can pull the clutch off and see if I can re-shim it to get it to pull in, but for now it looks like it will not.
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