The trailer that I bought, has electric brakes and electric lights.
The lights worked intermittently, such as worked only once or twice.
The electric plug is a two piece job, with wires held by screws, some wires fell out. Not good enough.
I bought a replacement molded one piece plug with 8 foot tail, and will use it. What I want is to do a good job rewiring the trailer. I believe that the trailer body is used as negative ground, which is not so great when there is corrosion. So I want to be sure that I follow "best practices" and to know what they are.