Hi, all. First day of being a registered user. I have a 2006 F-250 (6.0) to which I recently upgraded the headlights, turns and fogs bulbs only to LED. I'll try to keep this short, but I want to make sure that I put down everything I've done. Swapped out the fog bulbs for LEDs last week and everything worked fine. Today, I put in the LED headlight bulbs and now, the fogs won't come on at all. The interesting part is that when I pull the light switch out to turn on the fogs, it turns on the hi beams in the headlights. The fogs typically turn off when I turn on the highs, but the switch has never operated in the fashion. I've got a red, yellow and black wire coming from the ballast to the plug, so, thinking it was a polarity issue (which I still think it is), I clipped the wires and tried to rewire them in order to make it work as it should. No joy. The only other thing that I did was upgrade the flasher relay to an EP27 (electronic module) to fix the quick flash. I don't think that's related, but it's something different, so I'm putting it down. If any of you have any suggestions as to what I can try, it's greatly appreciated. Have a good one!!