LivingonEdge

I started to install wiring for a hitch and I forgot to take off the (-) terminal when wiring it back up. Now when I try to open the back gate nothing happens and I cant open it. The tail lights and everything work which is what I wired in to but for some reason randomly the back gate does not work at all. I checked for a blown fuse and the back gate ones were not blown so I do not understand what could have happened, does anyone know? thanks in advance