Sorry if there is another thread on this, but need some answers.
I have three trailers and none of the lights work right. They work, just not right. Flip a turn signal, get the flashers, hit the brakes with the lights on and they go out, and so on.
I have bought new harness's ( for two differant trucks) that plug into the back of the truck for the four way straight plug, but am getting mixed results.
Is it the ground, wrong harness,,,,,?