A/C Help on 2000 Pete 379

Discussion in 'Peterbilt Forum' started by Drpeterbilt, Jul 11, 2013.

  1. Drpeterbilt

    Drpeterbilt Bobtail Member

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    Jun 15, 2012
    0
    Hello, am needing some expertise on an a/c.... 2000 379.. no power to a/c clutch, relays replaced, tried jumping pressure switches to no avail. Can anyone tell me on the panel side of the relay where the power is supposed to be?? Shes getting hot out here, any help would be greatly appreciated. Thanks:biggrin_25514:
     
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  3. Smellfunny

    Smellfunny Road Train Member

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    Jan 28, 2012
    South Carolina
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    Probably a pressure switch. There are two. One above the radiator on the driver side and one about mid way near the horn on the firewall. Just follow the a/c lines and you will find them.

    The relay for the a/c compressor is the third one up from the bottom in the middle. It is to the right beside the push in white button to reset the tail lights that says 30A.
     
  4. Drpeterbilt

    Drpeterbilt Bobtail Member

    3
    0
    Jun 15, 2012
    0
    Thanks for looking.. I did jump the wires at the switches and that didn't work. I also checked power at the a/c switch with a test light, when I hit the switch with the test light you can hear the a/c relay clicking however it does not turn the on the clutch...leading me to believe it is a ground issue but am not too sure how this circuit works..
     
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