What Causes the Buzzing Sound When Turning on the Car Headlights?

1 Answers
SanKinsley
07/30/25 5:02am
When the car headlights emit a buzzing sound upon being turned on, it may be due to electromagnetic interference in the surroundings. Replacing the headlight wiring harness or adding a shielded wire to the navigation system can help. If the headlights are xenon lights, this is a normal phenomenon. During the startup of xenon lights, the oscillation frequency is low, and the current is high, which may produce a hissing sound. As the lights gradually brighten, the sound will diminish as the current decreases until it stabilizes. The functions of car headlights are as follows: 1. Illumination: Providing lighting for the driver to illuminate the road ahead, ensuring good visibility during bad weather or at night. 2. Warning: Serving as a warning to alert vehicles and pedestrians ahead.
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