What is the reason for the car tail lights working normally but the brake lights not lighting up when stepping on the brake?
2 Answers
When the tail lights are on but the brake lights are not lighting up, it may be caused by a faulty brake switch, brake light wiring, brake light bulb, or circuit fuse. Solutions for brake lights not working are as follows: Check the brake light bulb: The brake lights are the most frequently used lights on a car, and the bulbs have a relatively short lifespan. When the brake lights fail to illuminate, the first thing to consider is the brake light bulb. Simply replacing the bulb may solve the issue. Check the brake light switch: If the brake light switch is faulty, none of the brake lights will work. During inspection, you can use a wire to bridge the brake light switch. If the brake lights come on, it indicates the switch is faulty, and replacing it will resolve the problem. Check the fuse: If both the bulb and switch are confirmed to be functioning properly, the next step is to check the fuse. Some cars do not have a separate fuse for the brake lights and share one with other electrical devices. In this case, you can check the operation of other electrical devices in the car. Identify any non-functioning devices and replace the corresponding fuse.
When the car's taillights are on but don't light up when braking, there are usually several main reasons. I think the most likely is that the brake light bulb's brake filament is burned out—the taillight and brake light share the same bulb but have separate filaments; the taillight filament is fine but the brake filament is broken. It could also be a faulty brake light switch, located near the brake pedal, where the switch doesn't close to send power when braking. Or the fuse might be blown, usually in the fuse box, requiring a check of the corresponding fuse. Additionally, wiring issues like a short circuit or poor grounding could be the cause. If the problem just started, I suggest first checking the bulb socket or trying to replace the bulb yourself. If that doesn't work, take it to a professional repair shop to inspect the switch and circuit. Don't delay, as this affects the judgment of drivers behind you, increasing the risk of rear-end collisions, especially at night.
