Planning on taking the camper out tomorrow, so I go around doing a pre-check to see if everything is ready. I see I have no exterior lights at all. Brakes, running, turn signals are all out. After several hours of searching this site and general google results here's what I've done: -Replaced ground connection from plug receiver to camper frame. Thick white wire, coming out of the rectangle 6 pin plug. Didn't change the wire but put a new connector on the end and attached it to a fresh piece of wire after cutting off the last inch from where the old rusty connector was. No lights. -Checked fuses in the converter box. Breakers are not tripped, all fuses are ok. No lights. -Checked my tow vehicle's fuses. One in the engine fuse block dedicated to trailer harness, as well as all the lights for the car (car still has full functioning lights) All good, still replaced the trailer one to be safe. No lights. -Cleaned all plug ends, camper and TV, male and female. Still no lights. -Took a multimeter to my plugs. 7 pin male end from my vehicle tested positive with running lights and turn signal, and always-on/battery lead. Plugged in 7 pin female end, tested end of harness at rectangle end. Still tested positive. Plugged into camper. Still no lights. -Hooked a jumper wire from my vehicle to my camper. Ran from the front camper frame right near where other ground wires are connected, to under my vehicle. Tried several spots, including the cross brace for the hitch, and some area I assume is part of the frame, and a piece connected to suspension and frame. No lights. -Got under and checked all visible wiring for signs of broken, crimped, frayed, or disconnected wires. Saw none. Cleaned ground connections where I could. I didn't test the multimeter at any of the camper light sockets, because it's every single light that's out and I can't imagine a way the bulbs would all simultaneously fail. My battery is currently disconnected from the camper and on its charger, but when this problem started it was connected and I think having it disconnected wouldn't have changed anything, would it? Am I missing something?