LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

A/C compressor not coming on?

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Old Mar 17, 2004 | 07:52 PM
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AW/whiteZ-28's Avatar
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A/C compressor not coming on?

I checked the relay its fine. I checked the compressor it isn't stuck. I used a jumper wire and it came on like that, so I have narrowed it down to the power wire that activates the relay. But, is there something else in line to the relay that could be messed up or am I gonna have to replace the entire wire?

TIA
Archie
Old Mar 17, 2004 | 08:52 PM
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first you need to make sure that you ahve enough freon to let the system come on. if you do.. I would check the pressure switch on the AC line. should be a 3 wire switch. unplug it and jump power from the red wire to the grey aire at the connector and see if it comes on then
Old Mar 17, 2004 | 11:19 PM
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Ok I'll try that

Thanks
Old Mar 17, 2004 | 11:21 PM
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Also, if you have had a DTC for pressure problems, the PCM will lock out operation of the compressor. You have to reset the PCM to clear it.
Old Mar 18, 2004 | 10:06 PM
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Originally posted by shoebox
Also, if you have had a DTC for pressure problems, the PCM will lock out operation of the compressor. You have to reset the PCM to clear it.
Yea that's what I'm thinking it's gonna be I'll try that tomorrow

just got back from work and I'm soooo tired....
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