dash and tail lights

Its sounds like you have a headlight switch that is out. Here is a guide to help you see where you are losing power.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

I'd have to check the feed to and from the headlamp switch. At the rear of vehicle brown wire is voltage for the tail lights. I'd check the bulb-- bulb sockets-- wire harness at the rear. That brown wire should be hot/voltage with the headlamp switch turned on, use a voltage tester. Do the headlamps work ok?

Any applicable fuses, you have to use a voltage tester on the fuse circuit. There are two applicable fuses. One may be hot all the time and the other goes hot with the light switch turned on, check those fuses both ways, light switch on and off. One way or the other they should be hot. Instrument light fuse and tail fuse where applicable.

Check out the diagrams (Below)

Please let us know what you find.

Cheers