a/c relay problem

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Electrical Technical Information Discussion, a/c relay problem in Item Specific Cadillac Discussion; i am not ignition feed or ground to my a/c relay. what could be my problem....
  1. #1
    jknowlesdeville is offline Cadillac Owners Member
    Automobile(s): 1999 deville
    Join Date
    Jun 2011

    a/c relay problem

    i am not ignition feed or ground to my a/c relay. what could be my problem.

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  3. #2
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 85 Coupe Deville 4.1 V8 & 4.3 V6 Deisel & 1970 Eldorado
    Join Date
    Sep 2005
    East Tennessee

    Re: a/c relay problem

    If your system is low on freon or was low then the computer will disable the A/C Compressor. You will need to clear all of the trouble codes. See the stickys. Or disconnect the battery for 2 or 3 mins. Resetting via computer is a better option.

  4. #3
    Wendy-J is offline Cadillac Owners Member
    Automobile(s): 1993 Cadillac Sedan DeVille
    Join Date
    Jul 2011
    Somewhere in the ether

    Re: a/c relay problem

    With my '93, after the system has been switched off for low system pressure, I need to bring the engine RPM up over 1500 and going possibly as high as 2500 RPM to get the clutch to engage. *shrug* Even my mechanic couldn't figure it out and recommended the dealer when he managed to charge the system, then couldn't get the A/C to blow cold. It took the recommended 2.2 lbs, yet it wouldn't go. It was my getting on it to pass a car that got the compressor to kick in.


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