Electrical problems headlights

I have a 1999 Plymouth Voyager. And I am currently experiencing headlight problems. One day I went to put my headlights on brights and then back to dim. And the headlights went out on the low beam. I replaced the multifunction dimmer switch and it is still not working on low beam. So I changed one headlight bulb and still no low beam. What could be causing this problem?

If the high beams work and the low beams don’t, assuming the lamps themselves are ok, then the problem is still with the dimmer or its associated wiring.

If you have already replaced the dimmer go back into it and recheck your work.

Check the fuses, then the relays.

Both left and right???