It's possible that the fact that it's light or dark has nothing to do with your headlight working or not working. Look into other causes of the problem: Such as: Is is wet outside?, How about overheating of the components surrounding your headlights?
there are screws on the top and side of the light. They use torx screws. there are screws on the top and side of the light. They use torx screws.
Bad bulb, corroded socket, or loose or disconnected wiring.
The brake light switch is located on a bracket behind the brake pedal support.
Remove the light assy with the mounting screws.
go to Auto zone and ask them to check your codes its free
Outside - if they were inside, you would be blinded by the light.
Stuck brake light switch.
Check the brake light switch, it's under the dashboard, connected to the brake pedal.
I can help you I had that problem on my 1988 cutlass ciera and the answer is that one of the lights on the back not the third small on is not working. Open the trunk take out the bulb itself and check the wiring. That what was wrong with mine someone didn't have it wired right. Hope this helps you out.
There are 2 star bolts that adjust the headlights from the top of the light. The inside star nut adjusts where you are pointing the light side to side and the one on the outside adjusts your height.
how to installing a turn light switat in 1995 Oldsmobile ciera
You may want to consider replacing the thermostat.