not sure what you are referring to when you say a "taillight converter" if you have a turnsignal switch, power to it and a flasher relay that is all that is needed to make a light blink, try any auto wiring diagram it will have the same amount of wires copy it and they will work. or am i missing something, is this some voodoo lucas setup? like the zenon diode or what?(triumph jargon)
fred