I wired mine up to operate as a fog plus brake light. I had to drill 2 holes, 2 for the fog light and 1 for the brake light. I then ran my own wiring up through with the other wiring from the reverse lights and spliced into the driver side brake light and running lights. It operates normally with all the other lights and I have not had any issues at all. I also want to note that I used LED bulbs as I didn't want a huge power draw from the taillights and they don't produce as much heat in the lenses.
