Headlights My headlights work fine when the key is off they brighten and dim as needed but when I turn the key on the bright lights will not go off

SOURCE: dim headlight don't work but bright does and bulbs

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.

SOURCE: 99 chevy venture

check to see if all doors are shut tight,the same thing was happening to me,and it was the very back door that was the problem

SOURCE: my 2004 chevy impala dash lights wont come on

first thing I would check in this car is the dimmer switch, all you power for the dash lights go through it. check it with a meter to see what voltage is coming out of it, if this all checks out OK the move to the next thing in line, this would be the connection at the back side of the insterment cluster, use a good contact cleaner, I use CRC works good for me. now if this does not clear it up then you will have to inspect the clust printed board on the back of the cluster, look for hot marks, this will look like discolored spots just like a burn, sometimes its more suttle than an odviouse burn mark. I hope this helps you in your search for a solution. If you need a wiring diagram of what wire is what send me the Specs ont he Vehicle (year make model engine size)

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