The tail/park lights and dome lights will not come on. The fuses all checked out good. This is a pace arrow vision motor home.
When I connect the trailer light connection to the towed vehicle, then turn parking lights on to the towed vehicle, the motor home tail lights turn on. I have no problems with the head lights/brake lights on the F550, just cannot turn on the tail lights
Check to make sure the grounds are good going to the tail ights if this is fiberglass then they need seperate grounds to the tail lights. Also make sure your trailer ground is good and it goes to car as well otherwise the lights get screwed up.