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Wiring problem

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

Page 1 of 2
  1. 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.
     
    klcrawfordklc, Aug 2, 2020
    klcrawfordklc, Aug 2, 2020
    #1
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  3. Aug 2, 2020 #2
    bad-luck

    bad-luck Road Train Member

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    Baltimore, Maryland
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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
     
    bad-luck, Aug 2, 2020
    bad-luck, Aug 2, 2020
    #2
  4. Aug 2, 2020 #3
    klcrawfordklc

    klcrawfordklc Bobtail Member

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    Jun 3, 2020
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    The power to their AC/Heater controls and the power windows controls.
     
    klcrawfordklc, Aug 2, 2020
    klcrawfordklc, Aug 2, 2020
    #3
  5. Aug 2, 2020 #4
    klcrawfordklc

    klcrawfordklc Bobtail Member

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    Jun 3, 2020
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    It’s the power to the ac/heater control and windows controls.
     
    klcrawfordklc, Aug 2, 2020
    klcrawfordklc, Aug 2, 2020
    #4
  7. Aug 2, 2020 #5
    bad-luck

    bad-luck Road Train Member

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    Nov 16, 2013
    Baltimore, Maryland
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    OK, Sounds like The relay is overheating
     
    bad-luck, Aug 2, 2020
    bad-luck, Aug 2, 2020
    #5
  8. Aug 2, 2020 #6
    klcrawfordklc

    klcrawfordklc Bobtail Member

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    Jun 3, 2020
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    Okay thanks I will try locating that relay now and replacing it.
     
    klcrawfordklc, Aug 2, 2020
    klcrawfordklc, Aug 2, 2020
    #6
  9. Aug 2, 2020 #7
    klcrawfordklc

    klcrawfordklc Bobtail Member

    11
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    Jun 3, 2020
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    Change relay but still same problem!
     
    klcrawfordklc, Aug 2, 2020
    klcrawfordklc, Aug 2, 2020
    #7
  10. Aug 3, 2020 #8
    bad-luck

    bad-luck Road Train Member

    3,023
    5,433
    Nov 16, 2013
    Baltimore, Maryland
    0

    Ok, check the wiring at the a/c compressor. Trace the 2ires as far as you can. Check for frayed, bare wires.
     
    bad-luck, Aug 3, 2020
    bad-luck, Aug 3, 2020
    #8
  11. Aug 3, 2020 #9
    062

    062 Road Train Member

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    062, Aug 3, 2020
    062, Aug 3, 2020
    #9
  12. Aug 3, 2020 #10
    klcrawfordklc

    klcrawfordklc Bobtail Member

    11
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    Jun 3, 2020
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    Okay I will trace it this evening once I get back in. Thank you so much for your continuous help!
     
    klcrawfordklc, Aug 3, 2020
    klcrawfordklc, Aug 3, 2020
    #10
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