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Towing harness plug - no running lights

Discussion in '3rd Gen Tundras (2014+)' started by oleg8888, Nov 13, 2017.

  1. Nov 13, 2017 at 2:59 PM
    #1
    oleg8888

    oleg8888 [OP] New Member

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    I was rewiring the lights on my trailer (not the truck's) and must've messed up the wiring. Now there are no running lights. Brakes and blinkers work fine.
    Tested on 4 other trailers - no running lights.
    Fuses checked out fine.
    Any ideas?
     
  2. Nov 13, 2017 at 3:42 PM
    #2
    TruckinIt

    TruckinIt I STAND FOR OUR FLAG!!

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    Do you have running lights on your Tundy still?
     
  3. Nov 13, 2017 at 4:09 PM
    #3
    oleg8888

    oleg8888 [OP] New Member

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    Yes, everything is operational on the truck
     
  4. Nov 13, 2017 at 4:14 PM
    #4
    ColoradoTJ

    ColoradoTJ King Shock Pimp

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    Ground
     
    oleg8888 [OP] likes this.
  5. Nov 13, 2017 at 6:08 PM
    #5
    CM-LENNY

    CM-LENNY No Complaints

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    Something sounds strange if the running lights are not working on 4 other trailers. Sounds like maybe the wiring goof on the 1st trailer possibly shorted something out on the truck trailer wiring. If you look at the trailer plug cover (round 7pin) there is a diagram of what connection relates to what function. I would use a multimeter or idiot light and have someone in the truck run all the functions while you watch the tester. Good luck Oleg.
     
  6. Nov 13, 2017 at 6:57 PM
    #6
    muisejt

    muisejt New Member

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    looks like there is a TOW TAIL fuse and a relay
     

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    ColoradoTJ likes this.
  7. Nov 14, 2017 at 7:39 AM
    #7
    oleg8888

    oleg8888 [OP] New Member

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    Thanks muisejt, will check this out
     
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