How are the outside lights connected? Amerigo camper

GOOD DAY.
The lights are wired to the connector for the truck.
The tail light wires run through the ceiling beside the bathroom for the tail lights.
The stock tail lights use the hinge of the snap & nap for a ground.
Because the hinge is now 40+ years old you will find one day you have lights the next you don't
To save yourself a lot of aggravation run 2 new wires to each tail light.



Good luck