Passenger xenon sometimes doesn't turn on, makes clicking sound (Video)
The passenger xenon on my 03 325i sometimes doesn't turn on, and until now I realized that it makes a clicking noise when it happens. Does this sound indicate whether it is a ballast or ignitor problem? I'm pretty sure it's not the bulbs because this was happening even after I replaced both sides with Phillips 85122 more than half a year ago, but I will try and swap them back and forth between sides to make sure. I've attached a video to show you the sound. You can hear it when the turn signal light comes on, but the xenon doesn't.
Also, sometimes my driver side xenon flickers. Where should I begin in finding the problem?