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Do the headlights turn on but don't pop up? Assuming there's no grinding or weird noises,
try something simple like tightening up your battery terminals.
Headlight switch or dirty ground packs on the frame rails behind the headlights(that little black box with a small nut holding it to the frame,and a bunch of wires going to it,1 on each side,take them apart and clean them) Bill Curlee has a good writeup w/pix-do a search-
Try turning the headlight switch on "hard"-if that makes em work,the headlight switch is on it's way out..
Just kind of "spin" the switch fast when you turn it on,it seems to make better contact sometimes if you do.
Another thing to check is the headlight controller,it's mounted vertically below and behind the pass. side headlight-the black box with a bump in the middle with the wire looms plugged into it-check the connections first,and if that doesn't help,you can take the box apart and carefully clean the contacts in the ice cube relay mounted inside-this helped mine with a non opening issue,although the bulbs WERE coming on,just no popup.