Trailer wiring

  • tommygun
    Posts: 8
    April 23, 2017 at 5:44 pm #1690020

    Help needed, I have all trailer running lights but don’t have any brake/blinker on starboard side, port side works as it should as does truck. Ground issue? Thanks in advance for help.

    nhamm
    Inactive
    Robbinsdale
    Posts: 7348
    April 23, 2017 at 5:50 pm #1690025

    All new wires? Sudden issue?

    tommygun
    Posts: 8
    April 23, 2017 at 5:52 pm #1690026

    Yes worked fine when stored, trailer is 2 years old.

    Steve Root
    South St. Paul, MN
    Posts: 5621
    April 23, 2017 at 5:58 pm #1690030

    If it was a bad ground, then none of the lights would work (ground is used by all the lights). First off I’d try a new bulb. Next it could be a bad connection in the socket…take the bulb out and make sure the contact in there is clean. If it’s a wiring problem then it’s the green wire. The brown one is for the running lights.

    Trailer wiring Article

    SR

    tommygun
    Posts: 8
    April 23, 2017 at 6:12 pm #1690034

    Thanks ROOT! I’ll do some troubleshooting after din.

    Denny O
    Central IOWA
    Posts: 5819
    April 23, 2017 at 6:21 pm #1690040

    If the trailer is 2 years old, would it have led’s? I would thing a dedicated ground(not through the ball hitch) in the wiring plug is needed.

    Dusty Gesinger
    Minnetrista, Minnesota
    Posts: 2417
    April 23, 2017 at 7:04 pm #1690050

    Do you know the trailer wiring from the truck is working? Can be Separate fuses from the actual lights on the truck.

    biggill
    East Bethel, MN
    Posts: 11321
    April 23, 2017 at 7:05 pm #1690051

    Did you check your truck fuses? Had this happen to my trucks a few times. There’s typically a dedicated fuse for your trailer lights.

    Put a test light on your truck terminal.

    tommygun
    Posts: 8
    April 23, 2017 at 7:36 pm #1690053

    Trailer does have leds and all dedicated truck fuses were good, I disconnected the plug at the light and found green wire part of the plug to have some greening on it I cleaned both sides of the plug and put some new dielectric grease on it and we are now good to go all lights work as they should, thx for the quick responses. peace

    mxskeeter
    SW Wisconsin
    Posts: 3755
    April 23, 2017 at 9:01 pm #1690066
    tommygun wrote:

    Trailer does have leds and all dedicated truck fuses were good, I disconnected the plug at the light and found green wire part of the plug to have some greening on it I cleaned both sides of the plug and put some new dielectric grease on it and we are now good to go all lights work as they should, thx for the quick responses. peace

    If you don’t use any trailer in the winter clean your terminals and pack with dielectric grease in the fall. Winter salt is a killer on trailer plugs.

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