Why is the car brake light on?
2 Answers
Reasons for the car brake light being on: 1. Insufficient brake fluid; 2. Damaged brake switch; 3. Worn or aged brake pads. The brake light is generally installed at the rear of the vehicle, with a main color of red to enhance the penetration of the light source, making it easier for vehicles behind to detect the braking of the vehicle in front even under low visibility conditions, thereby preventing rear-end collisions. Car brake lights can be categorized by position into 3 types: 1. Rear brake lights; 2. Brake indicator lights on the dashboard; 3. High-mounted brake lights. Car brake lights can also be categorized by material into 2 types: 1. Gas car brake lights; 2. LED car brake lights.
I just dealt with this situation a few days ago when repairing a car. The brake light coming on is most likely due to worn brake pads. Many vehicles nowadays come with wear sensors, which trigger when the pad thickness is insufficient. If you hear a metallic scraping noise when braking, that further confirms it. It could also be because the brake fluid reservoir level is too low. Pop the hood and check the translucent reservoir; if the fluid level is below the MIN line, top it up with some DOT4 brake fluid. Don't take it lightly—once, a client ignored it, and air got into the brake lines, nearly causing a rear-end collision. Get it checked as soon as possible; safety-related matters are nothing to be careless about.
