08 it's been a while since I did this. I ran new wires on my truck from the connector near the power brake booster to the rear bumper to connect to a 7 pin receptacle. I did this because I wanted the larger wire for the extra 12 volt wire. I will try to find my pictures. I ended up putting these wires in a wrap and following the factory wires all the way to the bumper. I was lucky someone here had done it already and had a schematic. It may have been chuck but I noticed his pictures are not appearing on my iPad.

I will ill see what I can dig back up.

 

Ok thanks for the help. I presume the plug will work for a trailer for all functions minus charging if all wires except the 12v are connected correctly. I do not have a camper trailer yet to test this theory.