Yep. Fuses are good, bulbs are new. All parking/dash lights work. Even the high beams work. No headlights. Any ideas? If it may be a relay, could I please get a location or diagram please? Thanks!

Most likely defective light switch (the combination light/turn signal switch on the left side of the sterring column. I had an identical problem with a Nissan pickup and it was the switch. I had only high beams and parking lights, no low beams, as the lights would go out.