Been wrestling with an issue and now I'm stumped. My brake lights and turn signals work fine, but the running lights and hazards don't. The side marker lights work fine, but the running lights at the rear of the trailer won't come on, and when I put on my hazards only the left side works. What I have done to trouble shoot so far: I checked the wiring harness from the truck all the way back and everything is getting power as it should, and when it should. I cleaned and secured all 3 grounds. Since my truck did not come with a tow package I don't have auxiliary fuses to blow. So now I'm stumped, my next step is to buy a whole new light kit and replace everything. Thoughts?