I just bought a 02 2500 and the center aux pin on my trailer wiring (factory) has no power. Is there a fuse or something that I need to add to get the aux power? I checked the fuse box but didn't see an empty spot or blown fuse marked for trailer lights.
Thanks.

Are you talking a three pin plug or a 7 pin plug?

Here is the wiring diagram for the 7 pin: http://dodgeram.org/tech/mods/electric/trailer_wire.htm

It's the seven pin plug. Thanks for the diagram.