Remove the light assy with the mounting screws.
The brake light switch is located on a bracket behind the brake pedal support.
go to Auto zone and ask them to check your codes its free
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.
To replace the headlight bulbs on a olds ciera remove the park light then remove the 4 screws that hold the composite in pull the composite light out and then you can change the bulbs it is really easy to do just remove the park light and you will see the screws
Stuck brake light switch.
Check the brake light switch, it's under the dashboard, connected to the brake pedal.
how to installing a turn light switat in 1995 Oldsmobile ciera
Bad bulb, corroded socket, or loose or disconnected wiring.
Bulb burnd out replace
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.
You may want to consider replacing the thermostat.