Are the lamps OK? It's fairly inexpensive to replace them. If replacing the lams doesn't help, and the dimmer switch is also the turn signal/cruise/headlight on and off switch, you probably have to replace the entire switch. It's a pretty direct job that you can do yourself. I replaced mine a couple of years ago. At that time, the switch was about a $60 part. You'll need the proper size Torx wrench to get the shroud around the steering column off. After that, it's just a matter of a couple of screws and a couple of electrical connectors. NOTE: take a good look at where the electrical connectors sit and how the wiring is routed. If you don't get them back in the same place, you won't be able to get the switch seated correctly. You might also have a rattle.
If your headlights are hazed over like mine were (I've since replaced the entire headlight assemblies ... cheap on Ebay) you'll want to buy lamps that are brighter than the factory recommended ones.
Normally caused by faulty dimmer switch.
It might be the high/low beam switch. Had to replace one on my '96 when I had only low beams.
Not uncommon in that model; apparently the wiring harness is weak at the low-beam wire; read more in the forum below. gminsidenews.com/forums/f53/1997-pontiac-sunfire-headlights-40665/
Does the car have fog lights? I have a 2003 Sunfire that the high beams would not work on. This was caused by a short in the fog light wiring. I had the fog lights rewired separate from the harness (about $100) and the problem was fixed.
the inside bulbs are the high beams.
the low beam part of the bulb could be bad.
you may have a bad relay. If both of them are out, that is probably the relay for the high beams or it could also be a fuse.
Seperate circuits I believe.
Pulling the turn signal switch toward you should switch the lights to the low beams. If that doesn't work, you may have to replace the switch, which means replacing the entire turn signal stalk.
dont
Defective Heater Resistor Pack.
Low beam bulb burnt out? Replace bulb. Bulbs OK? If the dimmer switch is also the turn signal/cruise/headlight on and off switch, you probably have to replace the entire switch.