I have a 90 Prism that had the same problem. There is a platic spacer on the brake arm the crumbled with age. it is very hard to see where it is located. I glued a penny and a dime ( the thickness of the space ) to the brake arm....problem solved.
I don't know for sure about the Geo although we do have one but I just went though a similar situation with my Toronado. When I replaced the brake power booster my lights wouldn't shut off. I got under the drivers column and realized that the switch had been moved while moving things around to get the booster out.
On most cars there is a switch (with a little button that moves in and out) that must be up against the brake arm. If it is not up against it, the brakes are reading it as on. When the brakes are depressed up towards you, it depresses the button and registers as being free.
Hope that helped.
because you ugly alternater.
The running lights have a bad ground.
check the fuse for the brake lights, they have thier own. also check the brake light switch at the at the top of the brake petal
burnt out lightbulb!
33 Ft. lbs
Check the switch at the brake pedal .
I'm not a mechanic but I would start by checking the brake fluid level in the brake master cylinder in your engine compartment
check brake light fuse and brake light switch on pedal
Check the wire which is going inside of the trunk hood to the brake lights.
Blown bulbs, blown fuse, broken or out of adjustment brake light switch.
check the brake light switch on the brake pedal
burnt fuse ... tail lights are on a different circuit than stop or turn lights
Check the fuses.
Sounds like the main ground wire for the rear lights broke or rotted off the frame.
.41 is the gap specified by the Haynes manual for the 1990 Geo Prizm.
check that you have double filament bulbs in tail lights
Ther are three different engine configurations used on the 1990 prizm. Check a repair manual such as Haynes. If you plan on keeping the car for a long time a manual would be a good investment.
Brake Lights that Will Not Turn OffAlthough it's possible there could be other reasons, the most common causes for brake lights to stay on continuously include:The brake light [if mounting position is adjustable] is out of adjustment, orThe brake light switch contacts are fused ["welded"/melted] together, orThe brake light switch is otherwise defective.
If you have no brake lights or tail lights then you've probably got an electrical problem. Check the fuses first and see if you have one or more blown.
Your fuse could be blown, or the brake light switch is improperly adjusted.
check wire continuity- no power no lights
fault brake light switch, located at the top of the brake pedal.
where is the vacuum diagram located on 1995 geo prizm
Probably the rubber bumper/stopper which depresses the brake switch is gone/disintegrated. Check beneath the brake pad for broken pieces. Without this piece in place, the switch is always closed and therefore powered to light up the lights.
You probably have a loose wire connection in the brake light sockets. Insert a nail or probe tip into the back of the light socket where the wires are inserted and test the brake lights. (The socket can appear perfectly normal and the wires may even seem well attached.)