How to Adjust Scattered Headlight Beams to Focus?
2 Answers
To adjust scattered headlight beams, use a screwdriver to turn the screw rod behind the lamp bracket to adjust the beam until it reaches the focused position. Below are the specific reasons why car headlights scatter and fail to focus: Improper Bulb Position: Scattered headlight beams indicate that the bulb is not in the center of the lamp cover, requiring readjustment of the headlight height. First, check if the headlight base is loose. Inconsistent LED Light Emission Points: If the LED light emission point does not match the original car's emission point, it can cause the light to scatter. Adjust the bulb to align the emission point with the reflection direction of the original car's reflector to achieve a focused beam.
I've been driving for over a decade and have encountered several headlight scattering issues, usually caused by dirty or slightly scratched lens surfaces that cause light dispersion. Each time I notice this, I first park the car on level ground, find a white wall or building to align with, and turn on the lights to check if the light pattern is even. A distance of about 5 meters is sufficient. Then I manually adjust the adjustment screws behind the headlights, turning them for height or left-right direction, slowly adjusting until the light converges into a clear focal point. If the inside of the lens is cloudy or has moisture, I use a specialized cleaner to wipe the exterior or have someone disassemble the light to clean the interior, though this can be more costly. Bulb aging can also cause scattering—I solved this by replacing the old halogen bulb with a new one. I recommend making it a habit to regularly check your lights. Severe scattering not only affects your own visibility but can also easily dazzle oncoming drivers. If you're unsure how to adjust them, it's safer to spend a little money at a repair shop.
