I have 2002 dodge truck with factory trailer plug. I have no power to the plug for the trim and marker lights (tail lights) Everything else seems to work. Have lights on the truck. Have checked fuses, have check trail rely. They did not use the same wiring colors for the trailer lights as the tail lights on the truck. It's a 7 way plug with about 10 wires going into it. The truck also has a 4 way plug which seems to also be completely wired different and all works on it. Am stumped. Can anyone help.