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trailer wiring
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  1. Ford F-Series, Ford Super Duty, Ford Diesel
    When I plug in either 4 pin flat or 7 pin round the trailer running lights illuminate, but I don’t have blinkers or brakes. My truck lights work fine and I’ve tried 2 different trailers, one with brand new wiring. I’m thinking a fuse or relay problem? I check the fuses that correlate with...
  2. Ford F-Series, Ford Super Duty, Ford Diesel
    i have a 03 ford f150 heritage edition, I found out a few weeks ago that my 7 pin trailer harness isnt working, i have a aftermarket back up light hooked up to my reverse light in the harness and that works after i replaced my ground wire, but my turn signals and brake lights...
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