What is the principle of the brake light switch?

1 Answers
McEden
07/29/25 12:39pm
The principle of the brake light switch is that when the foot brake pedal is pressed, it pushes down on the brake light switch contact point, thereby closing the brake light circuit and illuminating the brake light. When the brake pedal is released, the switch contact opens, turning off the brake light. The brake light is installed at the rear of the vehicle and is primarily red in color to enhance the penetration of the light source. This makes it easier for following vehicles to detect when the vehicle ahead is braking under low visibility conditions, thereby helping to prevent rear-end collisions. The reasons why the brake light on the car dashboard stays lit continuously are: 1. Severe wear of the brake pads; 2. Insufficient brake fluid; 3. Damage to the brake switch.
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