[mrolds88]

I would pull all the old junk off of the truck. Keep the pigtail from the harness and rebuild from scratch. You really only need 3 wire trailer wire as the white is ground. As far as the marker lights, unless you are planning to have a rolling Christmas tree, you shouldn't need any special extra wiring. If you are worried about amp draw, use LEDs. They draw about nothing. Also most marker lights use a 194 type bulb, so a trip through Ebay would hook you up. Just make sure you have a good ground cable from the bed to the frame. And solder and shrink wrap is your friend!!!!