Why is the brake light of BYD S7 always on?
2 Answers
The brake light of BYD S7 staying on continuously is likely due to aging, cracking, or detachment of the brake pad shims. Below are the reasons and solutions for the brake light of BYD S7 remaining on: 1. Lack of brake fluid: Brake fluid plays a crucial role in the vehicle's braking system. When the driver presses the brake pedal, the force applied is transmitted by the piston in the master cylinder through the brake fluid to the wheel cylinders at each wheel, causing the brake pads to contact the wheels and stop the vehicle. Solution: Refill the brake fluid promptly. 2. Faulty brake switch: This usually happens when there is poor contact between the brake pedal and the brake sensor switch or the sensor switch is defective. Solution: Disassemble and inspect the switch. 3. Worn or aged brake pads: Worn or aged brake pads may also cause the brake light to stay on. Solution: Check the thickness of the brake pads.
Last time I drove my friend's BYD S7, I also encountered the issue of the brake lights staying on. The main thing to check is the sensor switch near the brake pedal. If that little thing gets stuck or gets water inside causing poor contact, the light will stay on. First, check if the floor mat is obstructing the brake pedal, then manually press the switch to see if it rebounds smoothly. Another possibility is a short circuit in the wiring, especially the bundle of wires under the trunk lid panel, which often bends and can easily get exposed and ground out. If you can't fix it yourself, it's best to go to the 4S shop to replace the sensor module as soon as possible. Otherwise, the battery might drain completely, and you could easily get rear-ended at night. My friend's car ended up costing a little over 200 yuan to fix. It's not a major issue, but it needs to be dealt with promptly.
