2016 Ram 3500 Lighting problems

When pulling gooseneck trailer the marker lights go out on the bed and cab of this truck. The dealers say there is no issue, this happens with every gooseneck trailer pulled by this vehicle. The research I have managed to find states the wires on the passenger side become pinched causing a fuse to blow. Without side marker lights, the vehicle is difficult to see at night. The first time it happened truck was at a dealer for unrelated issue, they replaced the fuse. Hooked back to the trailer, lights went out...

Tl* the contact owns a 2016 ram 3500. While driving 70 mph, both headlights failed to operate. The contact had to activate the high beam headlights. The contact also stated that the split tailgate doors were fractured. The vehicle was taken to folsom lake chrysler dodge jeep ram (12545 folsom blvd, folsom, ca 95630, 916-520-1135) where it was diagnosed that the light harness failed and the door latches needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and stated that the contact would be responsible for the repair cost. The failure mileage was approximately 158,000.