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Freightliner 2002 century classic

Discussion in 'Freightliner Forum' started by dll, Sep 26, 2013.

  1. Sep 26, 2013 #1
    dll

    dll Bobtail Member

    5
    0
    Sep 26, 2013
    0
    Electrical problem. When lights are on the trailer brake lights stay on until I put the right turn signal on. With lights out all works perfect. With trailer unhooked works perfect. Anyone had this problem and can tell me where to look? Thanks
     
    dll, Sep 26, 2013
    dll, Sep 26, 2013
    #1
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  3. Sep 26, 2013 #2
    deskdriver

    deskdriver Light Load Member

    241
    141
    Aug 6, 2013
    Michigan
    0
    sounds like a short in the pigtail. put a new one on and problem should go away
     
    deskdriver, Sep 26, 2013
    deskdriver, Sep 26, 2013
    #2
  4. Sep 26, 2013 #3
    dll

    dll Bobtail Member

    5
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    Sep 26, 2013
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    Pig tail is ok. Tried new one and same thing happens. Wires are ok from where pigtail plugs into back of tractor to where they plug into wires on frame. Still looking for problem. Thanks for replying.
     
    dll, Sep 26, 2013
    dll, Sep 26, 2013
    #3
  5. Sep 26, 2013 #4
    TruckerPete1990

    TruckerPete1990 Road Train Member

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    Jul 16, 2012
    Bentonville Arkansas
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    Does this happen with every trailer or same one?
     
    TruckerPete1990, Sep 26, 2013
    TruckerPete1990, Sep 26, 2013
    #4
    dll Thanks this.
  7. Sep 26, 2013 #5
    Freightlinerbob

    Freightlinerbob Road Train Member

    2,234
    1,316
    Jan 15, 2012
    West Coast B.C.
    0
    Do you have ordinary 4" sealed beam taillights? Edit: ( on the tractor )

    Try changing them and make sure the connections aren't corroded. If they short out inside they will feed back through the trailer cord causing similar symptoms as you describe.
     
    Freightlinerbob, Sep 26, 2013
    Freightlinerbob, Sep 26, 2013
    #5
    dll Thanks this.
  8. Sep 26, 2013 #6
    dll

    dll Bobtail Member

    5
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    Sep 26, 2013
    0
    I pull same trailer all the time. Parked beside friend and hooked his pigtail up from his tractor and worked fine. Thanks for reply.
     
    dll, Sep 26, 2013
    dll, Sep 26, 2013
    #6
  9. Sep 26, 2013 #7
    dll

    dll Bobtail Member

    5
    0
    Sep 26, 2013
    0
    I have square ones with bulbs in them but put led bulbs in them insted of regular ones. Going take them out and try regular bulbs and see what happens. Thanks for replying. Never thought of that.
     
    dll, Sep 26, 2013
    dll, Sep 26, 2013
    #7
  10. Sep 26, 2013 #8
    MPH2

    MPH2 Light Load Member

    244
    70
    Nov 20, 2012
    Strawberry plains, TN
    0
    Check your grounds on the tractor. If the ground is weak it will back feed the system. I bet if you find the trailer ground wire in the pigtail wiring and ground it to a good ground it will probably out away
     
    MPH2, Sep 26, 2013
    MPH2, Sep 26, 2013
    #8
    dll and MazelTruck Thank this.
  11. Sep 26, 2013 #9
    Freightlinerbob

    Freightlinerbob Road Train Member

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    Jan 15, 2012
    West Coast B.C.
    0
    That's very true. 99% of electrical problems are a faulty ground. If there isn't a ground available, it will back feed through another power wire. Like if the signal or brake is on and no ground present, it will try to ground through the running lights.
     
    Freightlinerbob, Sep 26, 2013
    Freightlinerbob, Sep 26, 2013
    #9
    dll Thanks this.
  12. Sep 27, 2013 #10
    dll

    dll Bobtail Member

    5
    0
    Sep 26, 2013
    0
    I'll check the ground in pigtail and all other grounds on tractor. If thats it will let you no so you don't spend a lot of time like I did on this issue. Thanks everyone.
     
    dll, Sep 27, 2013
    dll, Sep 27, 2013
    #10
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