HID's Headlights work and fogs don't
 

I just got Jon_To's bi-xenon kit installed headlights and fogs on my 2011 FX4. 1 of the ballast didn't work, so I switched it from a different kit I had for the time being, till I get the replacement. After I replaced it headlights and fogs worked properly, the next day both fogs worked then 1 started going out, then both are completely out and have been out ever since. Does anyone have any suggestions on what the problem may be.
Thanks!
Mike

Sounds like bad hardware (as in bulbs or ballasts). Unplug the HIDs from the fogs, and put some Halogen bulbs in. If the Halogen bulbs work then you have your answer.