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What Causes the Brake Light to Stay On?

1 Answers

VonBenjamin

07/29/25 7:28pm

Here are the specific reasons why the brake light stays on: 1. Faulty brake switch: This usually occurs when the brake pedal does not make proper contact with the brake sensor switch or the sensor switch is damaged. 2. Worn or aged brake pads: Worn or aged brake pads can also cause the brake light to stay on. It is necessary to check the thickness of the brake pads. If the thickness is below the specified value, typically 0.8 cm, there is a high risk of the pads cracking during driving, which can be dangerous. 3. Low brake fluid: Brake fluid plays a crucial role in the vehicle's braking system. When the brake pedal is pressed, the force applied is transmitted through the master cylinder piston and the brake fluid to the wheel cylinders, causing the brake pads to contact the wheels and stop the vehicle. Low brake fluid can also lead to noticeably reduced braking power and, in severe cases, a complete loss of braking. This issue can be resolved by promptly replenishing the brake fluid. Low brake fluid causes the brake pedal to sink, keeping the brake switch continuously powered, which results in the brake light staying on.

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