Is It Normal to Hear a Buzzing Sound When Turning On the Lights?
2 Answers
It is normal to hear a buzzing sound when turning on the lights. Reasons for the buzzing sound when turning on the lights: Because the LED headlights installed in vehicles generally have high power, although LED is a cold light source, it still generates a certain amount of heat when operating at high power. Therefore, during the design phase, automotive LED headlights are equipped with a cooling fan at the back. When the vehicle detects that the headlight temperature is high, the cooling fan automatically starts, resulting in the buzzing sound. Automotive Headlights: Also known as automotive front lights or LED daytime running lights, as the eyes of a car, they not only relate to the owner's external image but are also closely linked to safe driving at night or under adverse weather conditions.
I remember often hearing a buzzing sound when turning on the headlights while driving. At first, I was quite worried, but later my car-savvy friend told me it was the sound of the relay engaging, which is normal in most cases, especially in older cars or those with LED bulbs replaced. The electromagnetic operation of the relay naturally produces a slight noise, and as long as the lights work, there's no issue. However, if the sound becomes increasingly loud or irregular, accompanied by flickering lights or a burning smell inside the car, it could indicate a short circuit, loose bulb, or fuse problem. In such cases, it's important to get it checked immediately to prevent potential fire hazards. During routine maintenance, ask the technician to check the voltage stability to avoid noise caused by voltage fluctuations. Simply replacing the relay or bulb may solve most problems.
