Why does the Beidouxing's low beam not work while the high beam does?

2 Answers
Edwin
07/29/25 1:20am
The low beam of the Beidouxing car may not be working while the high beam does because the low beam filament might have burned out. Here is more information about high and low beams: 1. High beam: Adjusts the intensity of the light based on the distance of the filament. The high beam is at its focal point, emitting light that is parallel and highly concentrated, providing greater brightness and the ability to illuminate distant and high objects. When the high beam is beyond its focal point (between 1 and 2 times the focal distance), the emitted light diverges, illuminating a larger area of nearby objects. 2. Low beam: The low beam is designed for close-range illumination. Its design requirements include a wide coverage angle (160°) and short illumination distance, with no adjustable focus.
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McNathan
08/12/25 5:28am
I have extensive experience in car repairs, and encountering issues where the low beams don't work but the high beams do is quite common. This is mostly due to a burnt-out low beam bulb, as low and high beams usually have separate circuits. If the high beams are functioning normally, it generally indicates that the overall electrical system is fine. I recommend starting with the simplest steps: open the hood and check the low beam fuse in the fuse box. If it's blown, just replace it with a new one. If the bulb is faulty, unscrew it and check if the filament is broken. Replacing a new bulb isn't expensive either. If these checks don't resolve the issue, it might be due to worn switch contacts or loose wiring connectors. If you're handy, you can try tightening the connectors yourself or use a multimeter to test for continuity. If that doesn't work, it's best to take it to a professional repair shop. Don't overlook such a small issue—nighttime driving relies heavily on low beams to see the road clearly. A sudden failure can easily lead to rear-end collisions. I've seen several accidents caused by this. Regularly checking the lighting condition during routine maintenance can prevent a lot of trouble.
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