Check your fuse for your low beam.
Make sure you have power going to it.
Your high beams work but your low beams do not because the switch is broken that switches between high and low beams. Electrical switches wear out.
Bad dimmer switch.
low beams my have burned out
As a guess both low beams are burnt out The daytime running and high beams are the same light filament. Or the fuse or the relay for the low beams.
Bad bulbs?Bad Hi-low switch?
If low beams do not work and the high beams of a Mitsubishi Eclipse do, it is probably due to a corroded connector. Simply clean the connector and add some petroleum jelly to the terminals.
Why all of a sudden the low beams dont work but everything else does.
Check bulbs Check hi-low switch
low beam fuse blown.
Headlights have two filaments; one for low beams and one for high beams. There is a good chance that the low beams are burnt out. This doesn't necessarily mean that the high beams won't work. However, it's not too common for both low beams to burn out at the same time. Of course, it could be a fluke. I would replace the headlights with new ones and then go from there.
check all the wires that ground coming from the headlight
Bulbs are burnt. replace both. low and high are together in the same bulb.