I tracked the wire from the fixture down to a bunch of wires going into a lot of wire looms. At this point i made a command decision. 3 options, continue taking everything apart which could take hours, leave the light on, or make it go out. I decided 2 brakes lights were enough did not need 3 lights, so just cut the positive wire and bingo no more light. I'm not sure anyone could track that wire to where it spliced into main brake wire. It was not at taillight fixture. I'm usually not a quitter but I threw in the white towel on this one.