* Low brake fluid. This is the most common cause of a brake light coming on. When the brake fluid level is low, it means that there isn't enough fluid to properly transfer the force from the brake pedal to the brake calipers. This can cause the brakes to not work properly, which is a serious safety hazard.
* Faulty brake switch. The brake switch is a small electrical switch that is located on the brake pedal. When you press the brake pedal, the brake switch turns on the brake lights. If the brake switch is faulty, it may not be able to turn on the brake lights, even if the brake fluid level is full.
* Electrical problems. In some cases, a brake light may come on due to electrical problems. These problems can be caused by a variety of things, such as a loose wire, a blown fuse, or a faulty relay.
* Emergency Brake. If you have left the emergency brake up the light will stay on.
If your dashboard brake light is on, it's important to have your car inspected by a qualified mechanic as soon as possible. This will help to ensure that the brakes are working properly and that you're driving safely.
