Gas Guage/Int Light Issues

[JCampbell]

I've developed a problem lately and I'm not sure where it stems from or when exactly it started. When I turn on my lights, my dash lights don't come on, my gas gauge stops working (needle drops to 'e'), and my high beam indicator turns on for low beams/goes off when I hit the high beams.

Any ideas? I tore the dash apart this weekend to look for the obvious, but to no avail. Headlight switch maybe?