I started wiring my Triumph with the layout that everyone has seen on here before the standard negative ground setup. Anyhow, the question is I got all the lights running but I have no brake light and I followed the diagram to the core. I swapped the wires on the switch and still nothing. Am I missing something? I haven't checked to see if it is a dual filament bulb but the taillight is brand new (that old style Lucas setup). Maybe a crappy switch? Anyone else ran into this?