checked any bulbs just to make sure there not the problem?...
parking lights not working either?..
checked the grounds?(not sure where they are but 9 times out of 10 the grounds are the problem)
if i was you i would check the headlight switch and make sure thats working(checking power going to it and checking power coming out of it) then if that checks out then your problem would be after the switch and before the blubs, which it just wires i think..could have something to do with the drl module or some other control unit