Why does the brake light keep burning out?
2 Answers
Brake lights frequently burning out is primarily caused by burrs left on the circuit board during manufacturing that weren't properly cleaned. These imperfect contact points generate heat and deform when current continuously passes through, increasing the contact area until it's large enough to pass sufficient current to blow the fuse. Below is an expanded explanation: 1. Brake light overview: Brake light switches vary by vehicle model and typically function by completing/interrupting circuits to send electrical signals that activate related systems or control power to the brake lights. 2. Symptoms of faulty brake lights: A damaged brake light switch may cause symptoms like constantly illuminated lights, non-functioning lights, or intermittent operation. In severe cases, the vehicle's computer may mistakenly interpret braking when none is occurring, leading to increased fuel consumption and cruise control failure.
I recently dealt with the issue of brake lights burning out frequently, which was quite a headache. The main reason is that brake lights are used too often, causing the bulbs to overheat and burn out, especially when braking frequently on downhill roads or in traffic jams. Another issue could be voltage problems. If the voltage regulator of the car's alternator is faulty, a sudden surge in current can burn out the bulbs, so it's important to check if the voltage is normal—ideally between 13.5-14.5V. Electrical issues like short circuits or loose connectors are also common, so during inspection, check for oxidized or worn fuses and headlight switches. Avoid using cheap, low-quality bulbs—I once replaced mine with a no-name brand, and it burned out quickly. I recommend visiting a professional repair shop for diagnosis and discussing the benefits of switching to LED brake lights, which are more energy-efficient and durable. Avoid DIY repairs that could pose safety risks—road safety is not something to take lightly.
