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 until the beams are focused. Below are specific reasons why car headlights may scatter instead of focusing: 1. Improper bulb positioning: Scattered beams indicate the bulb isn't centered in the housing. First check if the headlight base is loose, then readjust the height. 2. LED light emission point mismatch: When an LED bulb's emission point doesn't align with the original reflector's design, it causes beam scattering. Adjust the bulb position to match the reflector's refraction direction for proper focus.
Last time I helped my neighbor adjust the headlights of an old Sagitar. The main issue with the scattered light was a loose adjustment screw. First, find a flat wall and park the car about 5 meters away with the headlights facing the wall. Turn on the low beams and observe the position of the cutoff line. Locate the two adjustment holes at the back of the headlight housing, then use a hex key to turn the vertical adjustment screw until the center of the light beam aligns with the height of the front wheel on the wall. Adjust the horizontal screw for left and right scattering, which requires some trial and error. After the adjustment, a test drive showed unsatisfactory results. Upon inspection, it was found that the reflective coating inside the lens had peeled off, so the entire assembly had to be replaced. Yellowing of old headlight lenses can also cause scattered light. Using a specialized polishing compound can provide a temporary fix.
