Fleabor

Okay the new brake light has one bulb that is the taillight and the brake light .. From the bike i have a black wire , yellow , and blue . On my new aftermarket taillight breaklight i only have a red and black wire . So do i wire the yellow and blue to the red ? Then wire the black to the black ? thanks

Hello too all ... I got a 1979 xs750 for $100 and it need some TLC .. I need to wire a taillight up since the bike did not come with one .. The bike has three colord wires yellow, blue , black my new taillight has two red and black . I tryed and got it to light up but when I pull the break it does not light up brighter .. What is the right wiring for the taillight ?? Any help would be great .