Have the alternator tested. I would suspect one or more of the diodes in the alternator are bad.
you can also have a wire that is exposed and that can be making them to flicker
I would also like to know this. Our van's healights and dash lights both flicker. The headlights are not very bright.
The alternator is on the way out.
Probably your alternator.
There are four adjustment screws under the rim that can be tightened or loosened for adjustments of the headlights on 2000 Ford Escort ZX2
The headlights may flicker.
voltage regulater on the alternater is going bad
You may have a pull on your batt, or a surge.
I had this problem and it was a bad alternator.
Sounds like you need a new battery.
If the lights flicker when the vehicle is running, the alternator is on it's way out.
You must remove the front bumper cover.. There is no way to get around it, unless you drill holes in the cover where the light mounting screws are located..