could be headlight fuse or headlight switch.
You didn't mention a problem.
I own a 1991 F-150 and had same problem. Check the high beam (floor) switch. That was my problem, I normally kick the switch.
have you replaced the dimmer switch? if not that may be the problem. I had the same problem in reverse( brights worked but headlights didn't) water damaged the dimmer switch on the steering column once I replaced it all was good.
Check to see if the foglight switch is on. Brights (high-beams) are automatically disengaged when fog lights are being used.
its ur starter
The problem could be one of two things. The most comon problem is the multi-function switch, (the swotch that turns your brights on and your signals, and your wipers when the contacts get worn out the headlights may not work,) Also doge had some serious problems with ignition switches, not to be confused with the tumbler this is what the tumbler mounts in.
Sounds like you have a faulty stalk/multifunction switch.
It is probably the dimmer switch. The contacts in the switch will get pushed back and when you switch to dims they will not touch. Had the same problem on my 91 Nissan.
The dim lights on a 1994 Grand Prix could go out when the headlamp switch is on if there is a short in the wiring for the headlights. There could also be a problem with the bulbs themselves if they were touched during installation. The oils in the fingers can short out new headlights.
Yes, if you have dual beam lamps.
There is no 2000...Trac's start at 2001.
either both bulbs burnt out highbeam only or you need a headlight switch (controls signals, cruise(if it has it), and headlights)