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    trailer lighting issue

    I have an old stock trailer that I just replaced all the wiring from the plug to the lights. This is a 4 prong plug and there are only 2 lights on the back end. I ran the wires and checked that they were working correctly at the back end before I attached the lights. The lights I bought were LED 3 wire lights. They have one wire for the tail light, one for the stop/turn, and one for the ground. The ground one had a little crimped on loop in the end of the wire so I could just screw it into the trailer, but I didn't. I connected it to the ground wire coming from the 4 prong plug. The others I connected to their correct wires.

    Now for the problem.

    When I have my lights on, the blinker/brake light does not work. If I turn off my lights the blinker/tail light does work. The lights won't let me have both a tail light and a blinker/stop light.

    I looked it up on the internet and one thing it said is possibly not enough grounding. I connected it directly to the ground wire from the plug. Is that enough? Should I have screwed it into the frame?

    Could I just have faulty lights? Both of them act the exact same way.

    #2
    Attach to frame. Most trailer light problems are bad grounds.

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      #3
      Originally posted by NSpannTX View Post
      Attach to frame. Most trailer light problems are bad grounds.
      X2 My favorite saying ,"Don't take nothing for Grounded"

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        #4
        yep, gound

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          #5
          grounding to the truck should be better than grounding to the frame. Something is wrong with your truck ground so ground it to the frame.

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            #6
            Should I unhook it from the truck ground and then ground it to the trailer or ground it to both?

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              #7
              Ground to the trailer and try again


              Sent from my iPhone using Tapatalk

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                #8
                Get a good ground.

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                  #9
                  I had to take my grinder and grind a bare spot where I mounted my ground wires. Then I sprayed over it with Rustoleum paint. All is good now. I knew it had to be a ground issue and tried several things before this and this fixed it.


                  Sent from my iPhone using Tapatalk

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                    #10
                    Originally posted by stinkbelly View Post
                    Should I unhook it from the truck ground and then ground it to the trailer or ground it to both?
                    both

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