Wiring problem

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by klcrawfordklc, Aug 2, 2020.

  1. klcrawfordklc

    klcrawfordklc Bobtail Member

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    I have a 2006 Peterbilt 378 The problem I’m having is the AC and windows stop working, but later it will start back on it’s on. This problem is continuing to happen, do anybody have any helpful information.
     
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  3. bad-luck

    bad-luck Road Train Member

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    When you say the a/c stops working. Do you mean the a/c compressor or the blower motor? It sounds like a relay is overheating
     
  4. klcrawfordklc

    klcrawfordklc Bobtail Member

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    The power to their AC/Heater controls and the power windows controls.
     
  5. klcrawfordklc

    klcrawfordklc Bobtail Member

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    It’s the power to the ac/heater control and windows controls.
     
  6. bad-luck

    bad-luck Road Train Member

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    OK, Sounds like The relay is overheating
     
  7. klcrawfordklc

    klcrawfordklc Bobtail Member

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    Okay thanks I will try locating that relay now and replacing it.
     
  8. klcrawfordklc

    klcrawfordklc Bobtail Member

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    Change relay but still same problem!
     
  9. bad-luck

    bad-luck Road Train Member

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    Ok, check the wiring at the a/c compressor. Trace the 2ires as far as you can. Check for frayed, bare wires.
     
  10. 062

    062 Road Train Member

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  11. klcrawfordklc

    klcrawfordklc Bobtail Member

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    Okay I will trace it this evening once I get back in. Thank you so much for your continuous help!
     
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