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1990 GMC AC problem-Compressor shuts down and after cooling it will come back on Power plug to the clutch has the 12 volts but will not kick the clutch Is clutch bad or the electronic dash control?
Slackir
I just did a entire ac replacement for the 1990 gmc sierra. You can use a test light to test the plug that is located at the top of the compressor. If it does not light up, you more than likely have a bad electronic dash control. Most importantly the clutch will not engage if the freon is low, so check your freon levels before you do anything. Hope this helps.
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∙ 15y ago
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