Several things on your cavalier could cause this to happen...
If it's just your high-beams, low-beams, or DRL that are out (just one), start with the DRL relay (in the fuse box). If that's not it, and it's not the DRL, try the multi-function switch (the thing attached to the left of your steering wheel, the headlight switch/cruise control switch). If all that checks out ok the next place to look under the hood... there is a pin-out connector/harness under the battery box (located in the front on the driver's side) that may be corroded. It is attached to the underside, and not easy to see without a mirror. If there is corrosion on the battery box, this connector is probably corroded as well...anything that runs off the battery will find it's way to this connector.
Note for anyone else that reads this: Different people will experience similar problems, sometimes with the low-beams, sometimes with the highs, because of different corrosion patterns and the DRLs being run from different bulbs.
Good luck...i hope this helps, please take time to rate me a fixya.
If the low beam doesn't work, the bulb is burned out. You can verify this by checking for 12 volts at the low beam bulb socket
SOURCE: Headlights won't go on; brights, parking lights OK
Hello,I see you have a problem with your low beams inoperative.It sounds as if your multi function switch has either gone bad. If you will dim and brighten your lights the switch may go back to working. You have to shake it in all directions. If they come back to working you will want to replace the switch as soon as posible on this car. Please rate this answer, Thank you.
SOURCE: Headlight one side works on bright the other side works on dim
Try swapping the headlight bulbs or buying a known good bulb and testing that way. Sounds like a shorted bulb filament issue.
SOURCE: 2004 Cavalier Day/dim lights not working
I finally got mine fixed!! It was the crossover wires between headlights(the wires that run in front of the radiator). One wire was torn into. Spliced them and taped back together. Hope this works for you!! I also used something called wire caps that help hold the spliced wires together. I found this solution on yahoo.com search engine where someone else had suggested this. My only problem was no dim lights, but all the other lights worked fine.
SOURCE: headlight problem
Hello Donald,
I have the same problem now, have you found a proper solution for this?
SOURCE: one headlight dim one headlight bright DRL doesnt
The dim headlight has a bad ground or bad wire, trace the black wire to a point where it mounts to the frame of the car and look for a broken, damaged, corroded wire. Repair and clean as needed.
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