Two problems related to fog light switch have been reported for the 2004 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Impala based on all problems reported for the 2004 Impala.
In may 2012 my headlights on my car started to not come on when needed. Then they would come on 10-30 minutes after the car was started. The headlights started "flashing" while the car was driving. The headlights went completely out after about a month. I have had the dimmer switch replaced, and the lights are not working at all now. The bright barely come on and I have to hold the stick down the whole time I want to use them. Sometimes if I need to drive a night I use the fog lights which have recently decided not to work at all. This is the worst car I have ever owed. I have had plenty of issues with this car on other issues.
My husband was driving at night at approximately 55 mph, with my dim headlamps on. Without any warning the headlamps went out, he went off the right side of the road way to avoid any problems. After checking he did have high beams and fog lights yet. He proceeded home on high beams. The low beams never have come back on.