Hi guys, me and my buddy installed an HID kit on his Audi A6 and it worked fine for a day, now one does not work. We exchanged a ballast, but no luck, switched a bulb and still nothing. We checked the fuses and everything is good. Im thinking that there is a short somewhere. What could the problem be, and did anyone ever have issues similar to this?

Thanks in Advance!

 

Multi meter can be your friend. Test for continuity. Also do a once or twice over everything.