What is the working principle of the brake light switch?
1 Answers
The working principle of the brake light switch is: by turning itself on and off, it sends a battery signal to prompt the relevant system to act or control the power on/off function of the brake light. During operation, it controls the turning on and off of the brake light by stepping on or releasing the brake pedal, i.e., when the brake pedal is pressed or released. When the light is on, it can alert the following vehicle that the leading vehicle has entered a braking state, prompting them to slow down or maintain a safe distance. Brake light switch inspection methods: 1. Turn on the ignition switch, press the brake pedal, and check whether the brake lights at the rear of the vehicle light up; 2. Use a diagnostic tool to perform self-diagnosis on the ABS, ASC, and DSC control systems to check if there are any fault codes related to the brake light switch; 3. For vehicles equipped with a DSC control system, the performance of the brake light switch is tested based on the brake fluid pressure sensor signal, and relevant fault codes are set to ensure the correct working stroke of the brake light switch.