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Thread: AC wiring is testing my soul!!

  1. 03-13-2013 11:05 PM #1
    1991SSP
    1991SSP is offline Senior Member
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    AC wiring is testing my soul!!

    I'm getting aggravated with the AC wiring.. I bought a harness from PSI, everything with it is fine, truck is running great.. I cannot get the AC to function properly.... here is what I have done so far...


    Installed the PSI harness and left the entire stock 98 model harness in place. I removed the stock (black) PCM from the truck and mounted the newer 411 PCM in the bracket.. I removed the pins on the AC system on the old harness and re-pinned them into the corresponding pins on the newer PCM but the AC system is not working... I have checked all fuses and nothing is wrong with them... is there something else I should be looking for??
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  2. 03-14-2013 08:02 AM #2
    gagliano7's Avatar
    gagliano7
    gagliano7 is offline Senior Member
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    It could be in the programming.I would call PSI they are very helpful when you have questions.
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  3. 03-14-2013 03:59 PM #3
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    blacstar
    blacstar is offline Senior Member
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    grab a volt meter and start looking
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