What does it mean when the small bulb on the dashboard lights up?

[SilasLee]

When a bulb-shaped warning light appears on the car dashboard, it indicates that a bulb somewhere in the vehicle has malfunctioned. This warning light should prompt immediate inspection and repair of the vehicle's lighting system to prevent potential safety hazards. Generally, this situation can occur due to the following reasons: The filament of the car bulb is damaged, causing the bulb to not light up. There is poor contact between the car battery and the bulb circuit, causing this type of warning light to appear on the dashboard. There is a loose connection in the circuit between the battery and the bulb, resulting in excessive resistance in the bulb's circuit, which can cause the car's built-in computer to misjudge the situation. Notes on using car lights: When driving in the city, use low beams. When passing through intersections without streetlights or traffic lights, switch to high beams as needed. On highways, use high beams and switch between high and low beams to alert vehicles ahead when overtaking. When changing lanes, use turn signals in advance to alert vehicles behind. In rainy, snowy, or foggy weather, turn on the side marker lights and fog lights to prevent rear-end collisions.