I dont think there are any inline fuses on HID's..but there should be a Fog-light fuse either under the dash, or under the hood..check to see if there is, and if its blown, that could do it.

If you have a relay harness, the relay may have gone bad...

Check all your connections, then double check, because it'd be weird for both bulbs/ballasts to go bad at the exact same time..