What is the reason for the abnormal noise after replacing the headlights with LED lights?
2 Answers
The reason for the abnormal noise after replacing the headlights with LED lights is that the related components of the LED headlights have become loose. In this case, it is necessary to remove the rear cover of the vehicle's headlights and reinstall the headlight assembly to resolve the issue. Sound produced by the cooling fan: Some LED headlights are equipped with a cooling fan at the bottom. Due to space limitations, the size of this fan cannot be too large. To achieve good cooling performance, the fan operates at a very high speed. The combination of small blades and high speed inevitably results in louder noise, which is why a buzzing sound may be heard while driving. Improper installation of the headlights: This may be due to gaps between the headlights. If the bulbs are installed without proper housing, it is recommended that the owner take the vehicle to a repair shop for a thorough inspection.
I also encountered a similar issue last time when I replaced my car's LED lights. Sitting in the driver's seat, I could hear a high-frequency buzzing sound near the dashboard. Later, I had a technician check it and found that the LED driver was of substandard quality. These drivers produce slight vibrations during operation, which are transmitted through the lamp socket to the car's metal brackets, causing resonance. Especially in older models, the original lamp socket design didn't account for LED characteristics, and the plastic clips weren't tight enough, making the buzzing sound more noticeable. Here's an interesting fact: some LED chips require pulse-width modulation for dimming, and this intermittent power supply method inherently emits sound wave frequencies that the human ear can detect.
