2006 GMC 2500HD Hitching hot wire to center terminal in trailer wiring connecter

[Steve-Maine]

I want to have a hot wire in center terminal. of trailer wiring, Every thing I have found show two terminals on fuse box under hood. Mine doesn't have those terminals. Where should I hitch up the wire, Thanks

[carkhz316]

Are you certain? The two terminals are the studs in/ on the fuse box. "Stud 1" is for your 12V feed to the 7-way connector that is fused through a 40 amp J-case fuse inside the box that you may have to install if not present. The other stud is for upfitting and is supplied power from a 30 amp J-case fuse. If your truck was equipped with trailering provisions, but not connected, you'll find a ring terminal taped up in the harness near the fuse box. This will be connected to the fuse box stud to for the 12V battery supply. If not equipped, you would install and connect wiring of your choice to the same location.

 

Side note, why are you wanting to connect it to the center pin? That is usually reserved for a reverse feed. The outside of the 7 way always has a dedicated pin for 12V.