Why does the brake light stay on after the car is turned off?

[MacEllie]

If the brake light stays on after the car is turned off, it may be related to a faulty brake switch or a short circuit in the wiring. The specific reasons are as follows: Faulty brake switch: Manually replace the brake switch. Short circuit in the wiring: Lack of brake fluid: Brake fluid plays a crucial role in the car's braking system. When the driver presses the brake pedal, the force is transmitted by the piston in the master cylinder through the brake fluid to the wheel cylinders located at each wheel, causing the brake pads to contact the wheels and stop the vehicle. Damaged taillight bulb: The brake fluid reservoir has upper and lower level marks. If the brake fluid level in the reservoir falls below the lower mark, the sensor next to the reservoir will detect this and reflect it through the brake light on the dashboard. If the brake fluid level drops rapidly, it indicates a leak in the braking system. Worn brake pads: The brake pads should be replaced. Note that if the parking brake is not released while driving, the light may also stay on. Therefore, first check whether the parking brake is released.