Just fixed my 2000 XLT! Thanks to Greg, who started this thread, and to all who contributed information and pics.
I had a moments trouble, like some others, removing my headlight switch until I determined mine was the "pry" type. I fashoned a 'j-hook' out of a bicycle spoke, put it into the slot at the bottom of the light switch and it popped right out. No way to damage finish on the dash this way, either.
There was an unused harness connector behind my light switch. In the pic below it's the one on the right with a red cap. Does anybody know what it does?
