68 C10 headlights stopped working ?

[Bjaxs]

Hi all,
I'm new here and hoping someone can help.
One day my high beams wouldn't come on but the lights still worked and the very next day both of them went out.
I have replaced the switch in the dash twice just to be sure and then replaced the dimmer switch on the floor and still no headlights. Everything else works fine so I took the dash apart and inspected all the wires and everything is connected good with no burned looking wires or frays anywhere so I am really at a loss as to what to do next, does anyone have a suggestion or point me in another direction?
The 327 engine and trany was done with new wiring less than 10k miles ago so it's not an old system and I am not a mechanic and was hoping to learn stuff on the way but I'm just lost now..
Thanks in advance for anyone taking their time to post.