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Just one bulb lights up everything??

Discussion in 'Freightliner Forum' started by Old Hullabaloo, May 1, 2019.

  1. May 1, 2019 #1
    Old Hullabaloo

    Old Hullabaloo Bobtail Member

    27
    22
    Feb 25, 2019
    0
    All my marker lights were inoperable. Then I replaced one bulb and they all worked. Are they on a string? Why is it like this? And is there some secret to determining which one is bad? Mine is a 1994 Freightliner COE.
     
    Old Hullabaloo, May 1, 2019
    Old Hullabaloo, May 1, 2019
    #1
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  3. May 1, 2019 #2
    RustyBolt

    RustyBolt Road Train Member

    2,073
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    Feb 21, 2015
    Bement, IL
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    Definitely sounds like they're wired in series. Probably not much you can do about it unless you have the time and funds to rewire it all. As for diagnostics, sing Christmas carrols while you're changing bulbs?
     
    RustyBolt, May 1, 2019
    RustyBolt, May 1, 2019
    #2
    HoneyBadger67 and Old Hullabaloo Thank this.
  4. May 1, 2019 #3
    mover man

    mover man Road Train Member

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    Feb 21, 2010
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    Your truck harness came from the same place that makes xmas tree lights.
     
    mover man, May 1, 2019
    mover man, May 1, 2019
    #3
    jammer910Z, mhyn and Old Hullabaloo Thank this.
  5. May 4, 2019 #4
    starmac

    starmac Road Train Member

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    Apr 11, 2019
    Fairbanks Ak
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    Are you certain that bulb was somehow not shorted out and had the breaker throwed?
    I ask because of a light problem I chased on a customers truck, finaly found where someone had used the wrong bulb and caused a short, which killed all of them on that circuit.
     
    starmac, May 4, 2019
    starmac, May 4, 2019
    #4
    Working2party Thanks this.
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