I recently put a hide a hitch on my Pontiac Montana and used the no splicing T-connector wiring. My van lights all work after my installation. I hooked up the camper to my new Hitch and connected the 7 pin plug to my brand new Flagstaff Popup and none of the campers lights work. The van lights still work. My freind towed the camper home for me and they did work when connected to his truck. Any ideas on what I may have missed on the electrical setup. Maybe a ground?