How to Adjust the High and Low Beams of Car Headlights?
2 Answers
Car high and low beams are adjusted via the light lever or knob on the left side of the steering wheel, with different methods for different vehicle models. Most cars activate the low beams by turning the lever knob one notch forward, while the high beams are activated by pushing the lever. Below is relevant information regarding the standard headlight adjustment wall reference: 1. Park the car 7.6 meters away from a wall, then turn on the headlights. The beam position can be adjusted based on the light's projection on the wall, sequentially adjusting both high and low beams. A represents the distance from the low beam to the central axis, B the distance from the high beam to the central axis, and C the distance from the low beam to the ground. 2. Adjust the height by turning the corresponding adjustment knob behind the headlight. Some headlights can be adjusted via the height switch inside the car. Generally, the low beam height for ordinary sedans should be below 70cm, while the high beam height is typically around 72cm.
Last time I adjusted the headlights myself, I first parked the car on level ground, faced a wall, and turned on the high beams to locate the light spots. Then, I felt for the adjustment screws at the back of the headlights—usually there are two: one controls the vertical angle and the other the horizontal. Using a Phillips screwdriver or hex wrench, I gently turned them a few times while observing the beam pattern on the wall to ensure it met the standard. If set too high, it could dazzle other drivers and violate regulations; if too low, the illumination would be insufficient. After adjustment, I took a test drive at night to confirm the effect. During routine maintenance, I also check to prevent the lamp socket from loosening. This DIY approach helps save on repair costs.
