Hey everyone! I seem to be having a problem with my truck. I just put in a refurbished tipm and just recently, after put in some trailer wiring. When I turn my headlights on, my brake lights and reverse lights come on and stay on. If I turn my headlights off, they work as normal. Anybody have experience with this? Or know where to point me? Thank you in advance.

posted a video as well

 

I would suspect your trailer wiring. Do the lights on your trailer work properly with your headlights off? What do they do with headlights on?