check fuses, if good, possibly burnt bulbs or wires, check for voltage at wires.
check the bulb low bean burns out before high beams
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.
Fuse or bulbs burned out. On most they are separate bulbs or high beam filament is broken if 2 in 1 bulbs.
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.
I believe that it is illegal to run fog lights and high beams together, however I could be wrong.
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.
Take your car in to have it checked. Turn signals should work without high beams.
First check the bulbs, if the bulbs are good I would suspect the high/low beam switch is bad.
You may need to replace your dimmer switch.
your bulbs are burnt out. when you switch on the high beams its only the high beams. but when you flash your brights it lights up both high and low beams.
check all the wires that ground coming from the headlight
Bulbs are burnt. replace both. low and high are together in the same bulb.