1 head light off and on?
have you tried hiting your light to see if it goes on.........and maybe its time to replace your light.......thats wat i did to mine when it do it to mine
check the conector first some time they get lose. when was last time u replace them. when they get too old the wires inside the ligth bulb get lose or start to break. they only last so many hours, then its time to replace them.


