What are the reasons for the car's high beam not working?

[VanGabriella]

Car high beam not working reasons are: 1. Relay or fuse failure; 2. Bulb filament burnout; 3. Poor wiring connection or open/short circuit; 4. Circuit breaker tripped or burned out; 5. Grounding issue causing bimetallic strip contacts to open; 6. High beam switch damage; 7. Generator voltage regulator set too high. Solutions for car high beam not working: 1. Open car fuse box, check relay and fuse condition; 2. Remove high beam bulb, check filament integrity; 3. Inspect headlight combination switch and wiring; 4. Check if generator voltage regulator is set too high.

[DiAxel]

I've been driving for many years and have seen plenty of cases where the high beams don't work. The most common reason is a burnt-out bulb—when the filament breaks, the current can't pass through, especially during long drives when the heat buildup is significant. It could also be a blown fuse; just open the engine compartment's fuse box, locate the corresponding position, and replace it to fix the issue. Loose or corroded wiring connections can cause poor contact, which is more likely in areas with heavy rainfall. Another possibility is a faulty high-beam switch or relay—try twisting the switch a few times to see if it's stuck. Not fixing it promptly is very dangerous; at night, you won't be able to see obstacles or pedestrians ahead clearly, and by the time an accident happens, it's too late. Once, while driving on a rural road, my lights suddenly went out, scaring me into a cold sweat. The next day, I rushed to the repair shop to replace the bulb. I recommend checking the aging condition of the lamp sockets during regular maintenance to avoid being caught off guard.

[McRicardo]

After having kids, I became particularly concerned about the car's high beams. That time when they stopped working, we pulled over to check: first, we looked to see if the bulb had burned out, as bulb aging or vibration loosening could be the cause. Next, we checked if the fuse had blown and replaced it with a new one, finding its location in the car's manual. Wiring issues, such as corroded connectors or short circuits, were also considered, especially since rainy days make these problems more likely. Sometimes the high beam switch button malfunctions, requiring multiple presses. If this issue isn't addressed promptly, driving the family out at night could be dangerous, increasing the risk of hitting something or causing an accident. Last time during a trip to the countryside, we wasted time because of this. Safety comes first—don't be lazy, get it fixed by a professional right away. Usually, drying the light area after washing the car can prevent a lot of trouble.

[Perez]

New car's high beams not working? I encountered this when I first learned to drive. The most common issue is a burned-out bulb filament - replacing it costs just a few dozen yuan. If it's a blown fuse, check the manual for its location and replace it. Don't force it if there's a wiring short or breakage to avoid damaging more components - have a repair shop test it. The switch or relay could also be causing the lights to malfunction. Never risk driving at night with poor visibility - it's extremely dangerous. The repairs aren't difficult, addressing it early saves trouble.

[Jon]

For car enthusiasts who love DIY, fixing non-working high beams is manageable. First, check if the bulb is burnt out by pulling it out and inspecting the filament. Replace a blown fuse in the engine compartment fuse box. Use a multimeter to test circuit continuity and repair any short circuits or broken wiring. The switch relay is located under the steering wheel—open it up and clean the contacts. However, if you're unfamiliar, avoid tampering with the relay; leave complex issues to professionals for safety. Regularly add protective sleeves to prevent wiring aging—it's cost-effective and convenient.