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Thread: Trailer Wiring

  1. #1
    Join Date
    Jul 2009
    Location
    Amherst, NS
    Posts
    379

    Default Trailer Wiring

    Last time I hauled a trailer with my jeep, the lights were extremely dim, thinking it was just a rusty ground, I thought nothing of it.

    This past weekend, I hitched up to my tent trailer with new grounds, lights are still dim, so i through the dmm on the hitch plug, and it was reading around 5 volts with blinkers, brakes and running lights, if they were on, same voltage across their corresponding plugs.

    Because it has a Litemate converter in the back, I backprobed the wiring a little further back, same voltage. I am guessing 5 volts isn't what it should be getting.

    Any suggestions where to look without ripping all the current wiring out lol.
    1995 XJ SPORT 4.0L / AW4 / NP231 / 4" Homebrew Lift w. Hacked Fenders / Disconnected / 48" Jack / Bedlined Floor & Exterior / 33" Eldorado MTZ / Stock Axles / Twin Rack Lights / Custom Bumper with 8500LB Winch / Stiffys and a load of steel that needs to find a place on my heep.

    ______ooo
    / _/|_|_|\___\___
    |/ : \_|_|_/ : \ |iiii|
    ( _ ) _ ) . ( _ ) _ )

    Dirty to the C.O.R.E.
    Cumberland Off Road Enthusiasts

  2. #2
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Trailer Wiring

    It is your trailer lights that are dim right? But your SJ lights are OK? It is probably that converter. Check the voltage going into it and out of it. You can stick a pin or needle in the wires and use your volt meter on that. That is probably where the drop is.
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
    Join Date
    Jul 2009
    Location
    Amherst, NS
    Posts
    379

    Default Re: Trailer Wiring

    XJ lights are good, I did check the feed wires going into the converter, same voltage as after it. Its all of the pins that are low, so it seems strange that the drop is the same across the board.
    1995 XJ SPORT 4.0L / AW4 / NP231 / 4" Homebrew Lift w. Hacked Fenders / Disconnected / 48" Jack / Bedlined Floor & Exterior / 33" Eldorado MTZ / Stock Axles / Twin Rack Lights / Custom Bumper with 8500LB Winch / Stiffys and a load of steel that needs to find a place on my heep.

    ______ooo
    / _/|_|_|\___\___
    |/ : \_|_|_/ : \ |iiii|
    ( _ ) _ ) . ( _ ) _ )

    Dirty to the C.O.R.E.
    Cumberland Off Road Enthusiasts

  4. #4
    Join Date
    Jul 2009
    Location
    Amherst, NS
    Posts
    379

    Default Re: Trailer Wiring

    Might just have to tear apart the cargo area and rerun all the wiring.
    1995 XJ SPORT 4.0L / AW4 / NP231 / 4" Homebrew Lift w. Hacked Fenders / Disconnected / 48" Jack / Bedlined Floor & Exterior / 33" Eldorado MTZ / Stock Axles / Twin Rack Lights / Custom Bumper with 8500LB Winch / Stiffys and a load of steel that needs to find a place on my heep.

    ______ooo
    / _/|_|_|\___\___
    |/ : \_|_|_/ : \ |iiii|
    ( _ ) _ ) . ( _ ) _ )

    Dirty to the C.O.R.E.
    Cumberland Off Road Enthusiasts

  5. #5
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Trailer Wiring

    I had mine apart a couple of days ago. Of course it is an 86, so it might be a little different. But I think it is factory, looks like it anyway. It has wires that go to the wiring to the lights. This is what I was talking about. Check the voltage to the box in these wires. You already know what it is coming out. You probably just need a new box.
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

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