I have a 2012 Burgman AN650. High beam headlight went off. Low beams working fine, passing flash working fine (which means the high beam bulbs are OK). But the high-low switch does nothing. I only get low beams. I replaced the switch, the whole unit and it worked for a couple of days. Now my high beams are gone again. I repeat that the passing flash switch works fine. Is it the switch again? Or is there something else doing this? Other than this everything else is working fine.