The button on your dashboard
could be a problem with the sesor in the emergency brake. a bad connection there could cause the light to blink with the vibration of the car running On some cars, the brake warning light will blink if the parking brake is set, and you drive... it could be a failed parking brake switch, assuming the brake is not applied. It is supposed to blink to get your attention. One car that does this is the Mitsubishi Starion, there are probably some others, too.
its a ground wire
Misfire detection.
The flasher unit for the indicators. Pressing and releasing the foot brake for the brake lights. Turning the light switch on and of for the others. If it is not any of these then there is an electrical fault, possibly a loose connection.
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.
check the brake fluid level. check all the brake linings for thickness.
Check the tail light ground wires. If a ground wire has become disconnected or if the grounding point has become corroded you could see what you're describing.
To replace the brake light switch on a 1995 GMC Sierra 1500, the steering wheel will have to be dismantled until the brake light switch is reached. The switch is changed by unplugging it and plugging in a new one. There are screws holding the switch in place.
Low refrigerant charge?
A short in the Brake light circuit? Bad brake light switch?
A low oil level can cause the oil light to blink on a 1995 Honda Prelude. A faulty sensor can also cause this.