7 Way Utility Trailer Wiring Diagram. The thing is I have to go to the tail lights to make attachments. The trailer wiring diagrams listed below, should help identify any wiring issues you may have with your trailer.
I have found a couple of things that appeared to describe how to figure out what wires do what - one of which takes me through testing for continuity and says I. Determine which color wire supplies constant power to the ignition switch. Manufacturer and reseller of cargo, utility, dump and specialty sports trailers, parts and cargo management accessories.
Color white blue green black red brown yellow.
Small utility trailers, light boat trailers, little campers, off-road.
Learn all about trailer wiring at HowStuffWorks. I agree on the grounding problem. The first thing you need to do is make sure that your connector works properly.