What does the brake stop lamp system do?

The brake stop lamp system serves a critical safety function by alerting other drivers that a vehicle is in the process of braking. When the brake pedal is pressed, a switch activates the brake lights, which illuminate at the rear of the vehicle. This visual signal is essential for ensuring that following vehicles are aware of the vehicle's deceleration, assisting them in maintaining a safe distance and preventing rear-end collisions.

The system is not involved in activating the antilock brakes, which are designed to prevent wheel lock-up during hard braking. Additionally, it does not have any role in controlling brake fluid levels or monitoring tire pressure, as those functions are managed by different systems in the vehicle. Therefore, the primary and vital function of the brake stop lamp system is communication with other road users through the illumination of the brake lights.