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Marker relay trips after 10 minutes

Discussion in 'Peterbilt Forum' started by Hertz309, Aug 28, 2017.

  1. Aug 28, 2017 #1
    Hertz309

    Hertz309 Bobtail Member

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    Apr 17, 2017
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    my marker light trips after I have them on for 10 minutes, I've changed relays and they won't reset anymore. Using a test light there is actually no power on the positive side of the marker relay box on the fuse box, guessing either a wrecked wire of the back of the fuse panel or wondering if anyone else has any ideas.. it did this 6 months ago with a different set of trailers so I'm guessing the problem is in the truck
     
    Hertz309, Aug 28, 2017
    Hertz309, Aug 28, 2017
    #1
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  3. Aug 29, 2017 #2
    Alaska76

    Alaska76 Road Train Member

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    IF I understand what you are saying - there is no power supply at the relay, to terminal 30 on the relay, then I suspect you have a breaker style fuse on the power supply to the relay. Find the fuse for that relay, replace it and recheck power supply to relay, also check that the ground for the circuit is in good working order.
     
    Alaska76, Aug 29, 2017
    Alaska76, Aug 29, 2017
    #2
  4. Aug 29, 2017 #4
    Hertz309

    Hertz309 Bobtail Member

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    Apr 17, 2017
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    The relay regained its power over night and this morning the lights ran for an hour this morning with the trailer cord unplugged at the truck.. I'm wondering is there another relay somewhere (dash, under the hood) for the marker lights that is getting weak?
     
    Hertz309, Aug 29, 2017
    Hertz309, Aug 29, 2017
    #4
  5. Aug 29, 2017 #4
    Alaska76

    Alaska76 Road Train Member

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    See post #2
     
    Alaska76, Aug 29, 2017
    Alaska76, Aug 29, 2017
    #4
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