AC compressor clutch not coming on
1991 Silverado k1500.
The blower works fine to bring in outside air, but when I press the AC button the compressor clutch does not engage.
What's the next thing to look at? - 80skeys |
Check the wire for power going to the A/C to see if it is gettin a signal.
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It sounds like if you have power, just remove it and take it to autozone and have them test it.
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Originally Posted by RUFFNECK4LYFE
(Post 59974)
Check the wire for power going to the A/C to see if it is gettin a signal.
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Now that I know there's no power to the compressor, where do I look next?
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Ok next locate the relay for it. Most systems have a fuse and a relay for the A/C. Only way for a quick check is to replace it wit a new one.
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Also check to see if there is power to one side of the low pressure switch.
I have replaced quite a few of those control heads too. Usually they will flash when there is an issue. |
There is no power to the low pressure switch. The control head is not flashing.
I have no idea where the relay is on this truck. Anybody know? |
I think its behind your glove compartment.
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It looks like there are three identical relays in a row from left to right, behind the glove compartment. None of them are labeled as to their function. Anyone know which one is for the A/C?
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