What are the reasons for the car's headlights not working?

2 Answers
MacLayla
07/29/25 3:37pm
The reasons for the car's headlights not working are: 1. Battery is low on power; 2. Wires are overheating; 3. Contacts in the lighting relay or combination switch in the circuit are corroded or stuck; 4. The fuse in the headlight circuit is blown; 5. The generator's diodes or coils are burnt out; 6. The headlight bulb is damaged. Solutions for the car's headlights not working include: 1. Charging the battery; 2. Reconnecting or replacing the lighting relay and combination switch; 3. Replacing the headlight fuse; 4. Replacing the headlight. Headlights are lighting devices installed on both sides of the front of a car, used for illuminating the road during nighttime driving, and come in two-lamp or four-lamp configurations.
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Teddy
08/14/25 9:22am
The other night while driving, my car's headlights suddenly went out. I had to drive in the dark for a while, which was quite nerve-wracking. After taking it to the repair shop for inspection, they said it might be a burnt-out bulb. The lifespan of headlight bulbs is about two years, and the filament is prone to breaking under high temperatures. It could also be a blown fuse, which burns out when the current is too high. The fuse box is located under the steering wheel and can be opened to check. Another possibility is poor wiring contact, where the harness in older cars becomes loose or worn out, requiring testing with a meter. They also taught me to regularly clean the dust from the headlight connectors to prevent oxidation and poor contact. I recommend that car owners don't delay when encountering this issue—get it checked or repaired immediately. Driving at night with poor visibility poses a high risk of accidents, and I learned my lesson this time.
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