2002 Impala headlights go off while driving

I have a 2002 Chevy Impala that the lights go off while driving. I hit the dim/ bright switch and they come back on. Anyone know what is going on. Thanks

Have you ever hit the headlight switch? Just turn it to off the on again? If so, do they come back on again?

This actually was occuring with my car ('03 base model) for a while. Turns out that the fix for me was making sure I heard the click when using the dimmer switch. I was being a little too gentle with it, and it would put my circuit in an uncertain state. Then out of nowhere, while driving sometimes, my lights would just go out. Ever since I started making sure to hear the click when dimming/bright I haven't had the problem at all!
Ogre