CAN bus is a communication bus (Controller Area Network). It allows neat things like sensor and actuator control and can even detect if a light went out. You don't have it. CAN bus Lamps have a resistor for the blown lamp circuitry to detect a GOOD lamp by checking the current a lamp SHOULD be drawing. You don't have it. Pay for it at your own expense. You will draw more current with a CAN bus bulb installed with zero benefit.
BTW, HD does use CAN bus along with BMW (and most German made vehicles, if not all of them).
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Last edited by sparkn; 04-17-2014 at 07:02 PM.