What are the adjustment standards for car headlights?
2 Answers
Car headlight adjustment standards are: 1. Drive the car onto a flat and open road surface; 2. Turn on the headlights and adjust the low beam projection point to approximately 30 meters from the car, ensuring the two projection points overlap; 3. Adjust the high beam projection point to be parallel to the ground. Car headlights are also known as car front lights or car LED daytime running lights. Maintenance methods include: 1. Regularly check the headlight's sealing; if the sealing ring between the lens and reflector is damaged, replace it promptly; 2. Clean the reflector periodically; if it turns black or the brightness diminishes, replace it; 3. Regularly remove dust and stains from the bulb.
I've been working in the auto shop for several years, and headlight adjustment standards are actually quite meticulous, typically referencing international regulations like SAE or ECE. Simply put, park on level ground, turn on the headlights about 10 meters from a wall with an alignment chart—it looks like a rectangular frame, with the top aligned to the center point of the headlights. The beam focus should hit slightly below the lower edge of the rectangle to avoid blinding oncoming drivers. Regulations require the beam angle not to exceed 1%, meaning a drop of no more than 10 cm per 10 meters. In practice, use a screwdriver to adjust the height screw, turning slowly to ensure the beam stays centered and doesn’t tilt. Many beginners set them too high, endangering themselves and others. I recommend checking alignment during annual maintenance, as rough roads can misalign the lights. Don’t skip this step—improper lighting can cause accidents. Night driving safety comes first, so always stick to the standard measurements.
