I have a set of 6000k hid's and the drivers side went out but the passenger side is still on. When I turn on my light the one that went out will flash twice real quick. But my ballast shows I have power and I hooked the bulb to the other side and it come on. (05 Screw w/ 5.4) Please let me know if anyone has any clue whats going on. Thanks

 

The two flashes is probably it trying to ignite. If you swap bulbs (driver to to passenger, passenger to driver side) and the problem follows, it's probably a bad bulb. If not, then it may be the ballast.

Also, make sure all wiring is connected properly (especially grounds).