so i got my brake controller hooked it up to the harness that comes with the truck and i put the 40a fuse in the B+ spot in the under hood fuse panel and when i hook the truck up to the trailer the green light doesnt come on so obviously i dont have power anyone else have problems hooking these up ? 2006 silverdao 5.3ho 4spd 4wd, tekonsha voyager brake controller