I have 1968 gt fastback the head light have gone out. First just the low beam then a wek weeks later the high beams . I have put new headlights in, new headlight switch,new dimmer switch, new fues, new starter relay. I can not get the lights to come on. Any ideas.

 

Are you getting power to your headlights? Check there and go back until tou find power. It could also be the ground.

 

Sounds like an open circuit...broken wire maybe? Trace the harness and inspect all the wires...