What Causes Headlights Not to Work?

[ColemanLee]

There are many reasons why car headlights may not work, including burnt-out bulbs, overheating wires, damaged relays or combination switches, open/short/break circuits in the wiring, blown fuses, and poor electrical connections. Here are the specific details: 1. Check the fuse: The first step is to check whether the fuse is intact, as sudden headlight failure is often caused by a blown bulb fuse. 2. Timely inspection and repair: If the bulb lights up briefly when turning on the headlights but then goes out, it may indicate poor wiring connections or an open/short circuit. A short circuit can easily burn out the bulb. If bulbs frequently burn out, check whether the voltage regulator on the generator is set too high. If the car headlights suddenly stop working, prompt action is required. It is recommended to visit a professional repair shop or 4S store for inspection and repair to ensure safety and reliability.