What to Do If the Rear Car Light Stays On?
2 Answers
If the rear car light stays on, it is usually caused by a short circuit in the brake light switch, which requires replacing the brake light switch. If the issue is not due to a faulty brake light switch, it may be caused by an electrical circuit malfunction in the car. In such cases, the owner should not attempt to fix it themselves and should instead seek professional assistance at a 4S shop or a specialized repair shop. The rear car lights include turn signals, brake lights, position lights, rear fog lights, reverse lights, and parking lights. The reasons for the rear car light staying on may include: 1. Driving without releasing the handbrake can also cause the light to stay on, so first check whether the handbrake is released. 2. The brake fluid reservoir has upper and lower limits. If the brake fluid level falls below the lower limit, the sensor next to the reservoir will detect this issue, and the brake light on the dashboard will indicate it.
This rear taillight keeps staying on, I experienced it once and almost drained the battery. As a veteran driver with years of experience, I've found the common causes are either a stuck or faulty brake light switch located under the brake pedal. For manual transmission cars, the clutch switch could also be problematic; for automatics, it's usually due to switch aging. First, park and check by pressing the brake to see if the light responds. If no change, inspect the fuse box to see if the corresponding fuse is blown—pull it out and try replacing it. Electrical shorts are another frequent culprit; aging wiring can easily cause short circuits, keeping the light on and draining power rapidly. I've also learned that prolonged battery discharge can lead to premature failure, costing more in the long run. At night, a constantly lit light might mislead drivers behind into thinking you're braking, increasing rear-end collision risks. Quickly visit a roadside repair shop—they can use a multimeter to test voltage, and replacing the switch or wiring usually costs just a few hundred bucks. During regular maintenance, check switch positions and apply some lubricant to prevent dust buildup, which helps avoid such issues. In short, don't delay—safety first.
