How to eliminate the current noise of LED lights?
2 Answers
If the current noise appears right after replacing the LED lights, it is most likely caused by the excessive power of the LED headlights. If the wattage of the subsequently modified LED lights is as high as 75W, current noise will occur when the lights are turned on. Secondly, if the vehicle is equipped with xenon headlights, the current noise will gradually decrease and eventually disappear once the xenon lights enter the working state.
I've modified quite a few car LED headlights. Whenever I hear that buzzing current sound, my first instinct is to check if the driver is a cheap one. That noise sounds like a beep, mostly caused by circuit resonance. I try replacing it with a high-quality driver module, like choosing a compatible model, and the noise usually disappears. If it still persists, I'll tighten the mounting components to reduce vibration and use a multimeter to check for significant power voltage fluctuations. Sometimes the car's electrical system has unstable power supply, so I add a filter to smooth the current. The whole process is a bit troublesome, but it can completely solve the problem, and doing it myself saves a lot of money. Most importantly, it avoids any impact on driving safety. I also regularly check for wire aging—prevention is better than cure.
