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I'm getting no power to my ac clutch. I have a 1994 GMC sierra

With the AC off I'm reading .4v on the clutch power plug. When you turn the AC on the power onlt jumps to .6v. When I jump 12v to the clutch from the battery the clutch will engage fine and the AC cools like a champ. I found a switch relay behind the glove box and switched it out with another of the same part number from the truck. I still get the same results at the clutch.

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Either it is under charged or the pressure switch is bad.

Posted on Jul 26, 2009

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