First check the bulbs, if the bulbs are good I would suspect the high/low beam switch is bad.
low beam fuse blown.
you blew out a fuse under the hood just change it and it should work
the fog lights work with the low beams , they wont come on with the high beams
Have you checked the drl relay?
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.
first check the bulbs then the curcut then the fuses on the fuse board
The switch assembly is probably worn out and malfunctioning.
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.
If the high beams will not work on a 1997 Escort even after the relay was changed, it is possible that the bulbs are burned out. It is rare, but it does happen that both bulbs will burn out at the same time.
Take your car in to have it checked. Turn signals should work without 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.
You wont be able to see anything, the light will just bounce back off the fog, never ever drive with your high beams on in hevy fog. just keep your low beams on.