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Thread: AC Not Working

  1. #1
    Tuner in Training
    Join Date
    Oct 2013
    Posts
    10

    AC Not Working

    How do I setup my AC System in the tune?

    Here is my file.

    My vehicle is a 98 Silverado with stock 98 AC system.

    My AC light wont come on and I checked all my wires at the PCM and they are in the correct locations.
    Attached Files Attached Files
    Last edited by toyhaulerobs; 05-29-2015 at 03:45 PM.
    1998 Silverado with an LQ4
    Carbed 1999 Sonoma With Nitrous

  2. #2
    Tuner smokestack's Avatar
    Join Date
    Jul 2011
    Location
    West terre haute Indiana
    Posts
    111
    Im mobile so look at your tune. But what wire harness did you use? Sounds more like a wire issue than tune. Helped with a swap like yours and all went well. Purchased wire harness though.

  3. #3
    Tuner in Training
    Join Date
    Oct 2013
    Posts
    10
    I used the original wires and pinned them to the new PCM. I checked it over tonight and I am not getting a AC Request Signal from the Climate Control Module. I tested the wire coming from the switch and I have no change on the wire whatsoever. Right now I have it rigged with a switch to turn on a fan and send the signal to the AC relay. Temp for now til lI can figure out what is going on.
    1998 Silverado with an LQ4
    Carbed 1999 Sonoma With Nitrous