Originally Posted by webjester
Just to reiterate, the central control electronic measures the current to the low/high beam and disables the output if the current is either too low or too high to warn of a failed bulb or prevent circuit damage, respectively (remember, this bike does not have fuses). It does that by measuring the voltage across a shunt inside the module and only allows a certain voltage window.
Huh? What year? My '05 applies power to the bulb even when the bulb is burned out (or missing). I know this as the headlamp power on my bike triggers the relay for my fog lamps and the fog lamps stay lit with a burned out bulb. I tested that before using the headlamp as the trigger.