Hello. I have a 1996 Dodge Ram 1500 2 wheel drive truck with a factory towing package. I had a friend rewire the light connector for a trailer I just purchased and he couldn't figure out what wire did what. I am putting on a 7 wire plug and would like to do this right the first time. Can you help?

Thank you
Annie2horse

This web site will give you your answer
Trailer Wiring Diagram For 4 Way, 5 Way, 6 Way and 7 Way circuits