ap1 ballast
 

as i was driving home last night, i thought my one of light bulb on the ap1 burn out but still work as i mess with the light switch on/off. It turn back on but turn off within a few minutes driving it. It get annoying, at least i was able to get it home without the cop hassling me for driving with one light on. Pretty sure the problem is the ballast right? And damn those oem ballast is pretty pricey new too.