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Weird Climate Control Problem

Discussion in 'GM Electrical Tech' started by stephenjohler, Sep 25, 2012.

  1. stephenjohler

    stephenjohler New Member

    Okay so i got a 94 silverado. Ac and heat on the climate control. None of the buttons work at all. No display no nothing. But when i hit the parking lights on, i get illumination behind the actual buttons not the display. What the hell? Has anyone else had this problem?
  2. RayVoy

    RayVoy Well-Known Member 2 Years 1000 Posts

    Well, the lights your seeing are only the same as the dash lights, they come on with the head lights, just like the radio.

    You may have a blown fuse (look for those labeled HVAC), a loose connector at the back of the display unit, or a bad display unit. Check in the order I presented.
  3. stephenjohler

    stephenjohler New Member

    Already did. I tore the whole truck apart and i cant figure it out. Checked all the fuses and relays. Don't know where to go from here. I put a test light on all the pins to the unit and its got power. I think i just need a good wiring diagram. I went to the junk yard and got a unit, same thing happens when i plug it in. But who knows if that was a good one.

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