What is the purpose of the brake light switch?

The purpose of the brake light switch is to activate the brake lights when the brake pedal is pressed. When a driver steps on the brake pedal, the brake light switch gets triggered to complete the electrical circuit, illuminating the brake lights. This is essential for safety, as it alerts drivers and pedestrians behind the vehicle that it is slowing down or stopping. The visibility provided by the brake lights is crucial, especially in traffic, as it communicates the driver's intention to reduce speed or come to a halt. This function is a fundamental aspect of vehicle safety systems.