My Dad has 2004 2wd without the trailer hitch. He has a small lawn trailer he pulls his lawn mower on ( ball on the bumper) and wants the trailer lights to work. I have looked for a harness to plug into the wiring on the rear of the truck but not having any luck. I have heard that the wiring is already there under the bumper and you just need a adapter harness to hook into it anyone know for sure.
I have not looked yet but will be going to his house this weekend and will look then to see what is there