I have a tent trailer and the lights don't work right. It has a 4 wire connector to my car but one of the wires on the trailer connector was worn out and probably not working. So I got a new 4 prong connector for the trailer but that 4 wire adapter goes to 6 wires on the trailer. This particular trailer has what I call "surround" lights in addition to turn signals and brake lights.
So, one wire is "common" and I've used alligator clips to hook up and test what the other 5 wires do. One of them does nothing and I think it's because one of the connections in the back are not connected and today I'm going to try and take off the back panel to get to the lights (the light fixture itself is riveted on).
So, what should each of the wires do and how should I hook them up to my 4 wire system? Also the brake and turn signals are the same bulb just different filaments. I call them the "small filament" and the "big filament" even though they are the same size. When the parking lights are on, is that the "small filament" on and then the brake and turn signal activate the "big filament"? And that can't be right because what if I'm stopped and have the turn signal on. I'm confused as you can tell.