If it's an aftermarket light and it's plug and play with the BD circuit then I would asume you'd also need some sort of blinker relay if it's not already built into the light. you can't wire them together cause you'll be defeting the purpose. Now that I think about it, it can be done with some old relay logic but that would require adding two form C relays you bike. The funcion would be to have the brake light would be wired to the normally closed contact of the relay and the turn signal to the normally open. when the blinker button is pressed, power would be sent to the coil of the relay which in turn energizes the relay opening the contact for the brake signal and closing the contact for the blinker allowing the light to flash and prohibitting the brake light to go on. I could draw it up for you if you needed but surely someone's had to have tackled this in the past. Just let me know.