Simple right? Ha! 6 hrs later I'm looking for some help. Putting all new lights and wire on the trailer. Two tail lights with turn signal, and two marker lights. Lights from truck work fine. Take me through this step by step. Nothing is working. Ground to trailer frame? Tail lights from truck to left tail then to right tail? Right turn to right turn? Left to left turn? I have the marker lights spliced into the tail light wire? These light ground to the bolts, so there isn't a ground wire on the lights. I sanded the paint off where the bolt and nuts ground. ???