so I installed hid's on my car awhile ago, and they worked great for awhile, and recently the passenger side light doesn't turn on, then I flip my lights on and off a few times and it turned on, but now it won't ever turn on. I checked the bulb and it looks fine so I'm assuming its a problem with my ballast? Any ideas anyone?
thanks!

 

the connections are good? i mean they do contact?

 

Why don't you try hooking the working bulb to the other ballast. If it works, it's the bulb, if not, it may be the ballast.

 

Yes they all contact

 

I had the exact same issue. I am 99% sure that it is your connections. What HID kit did you buy? Was it from visionbulbs by chance? Anyway, what I did was this -
I took some needle nose pliers and squeezed down on the connectors between the Ballast and the plug going to the bulb. Should be two connectors. Anyway, after I did that, I tested the lights and they both worked so I took some electrical tape and taped both of the connectors together and I haven't had a problem since. Hope that helps.