After driving a while the dash lights turn off

Hello,

This sounds like there is a bad connection inside the headlight switch or TNS relay. here are instructions in the diagrams below to help you change it out and test the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here is the relay location and the wiring diagrams so you can see how the system works. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.