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 problem is probably in the dimmer switch but it needs to be checked out.
Normally caused by faulty dimmer switch.
Seperate circuits I believe.
low beams my have burned out
the problem is the switches themselves, just poorly designed.
Bad bulbs?Bad Hi-low switch?
Bad dimmer switch.
Check your owners manual.
fuse, bulbs or switch
Bad bulbs Bad dimmer switch
I would suspect the dimmer switch. But could be a bad wire/short.