The brake's Master Cylinder may have a problem - see your mechanic to repair this dangerous problem : do not drive this vehicle until repaired .
press down firmly on the brake pedal and keep holding down the brake pedal
Check either on the steering column down by brake pedal or on side of transmission Check either on the steering column down by brake pedal or on side of transmission Check either on the steering column down by brake pedal or on side of transmission Check either on the steering column down by brake pedal or on side of transmission Check either on the steering column down by brake pedal or on side of transmission
when your brake pedal moves up and down when you press the pedal ,usually it is a warped brake rotor or a loose bearing on one or both brake rotors Warped front disk brake rotors.
Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.
There is an electronic relay switch which turns on the rear brake lights-It's located behind the brake pedal- It clicks when you push the pedal down, making contact.
Adjust or replace the stoplight switch at the upper end of the brake pedal under dash area
The clutch pedal.
Sounds like you have a problem with your brake light switch under the dash, mounted on your brake pedal metal arm assembly. I know if I get my head down near the brake pedal and push the pedal with my hand I can hear a loud click noise when the brake lights come on. I'm not a mechanic, but I've wondered if the brake fluid level is down in the master cylinder, does the brake pedal drop enough for the brake light switch to turn on the brake lights ?
Look under the dash on the driver's side, half way down the brake pedal. When you depress the brake pedal, the pedal moves away from this switch, which allows the brake light pedal circuit to complete, and your brake lights come on. This brake light switch is always hot/on, as required by federal law, so that even with no key in the ignition, if you hit your brake pedal, the brake lights will come on.
Start the engine and then push the brake pedal down. If it is soft and easy to push then the booster is okay. If booster is BAD the brake pedal would be hard to push.
Sticking Brake LightsI had this very same problem when I owned a Nissan 300zx. There is a switch in front of the brake pedal that when the brake pedal is pressed the metal part of the pedal presses down on a little button which turns the brake lights on when pressing the pedal. What I did was I got under the dash, took a flashlight and put a little piece of tape in between the pedal and the switch. It acted as a cushion because the pedal wasn't pushing down on the switch as it was pushing on the tape and when I pressed on the pedal the lights would come on but the tape pushed the pedal back to shut the switch off. If you want to avoid all this consider having your brake pedal adjusted. If your brake lights come on still consider having your cars wiring checked out.
Faulty Vacuum Brake Booster.