When getting the jeep hitch installed, I asked them to run an isolator and wire for 12volt through to the trailer. So currently I have power to the 7 pin plug. On the trailer side, what do you do to run the power the rest of the way into the trailer..Most likely through any wire opening already in trailer. Which pin do you use on the trailer side and do I need to ground the trailer (I'm thinking so). How about if the trailer is all aluminum.
Any help would be great
Al