Do headlights need adjustment after replacing a bulb?
2 Answers
Headlights do not need adjustment after replacing a bulb. Method for adjusting headlights: Find a wall, ensure the ground is level, and park the car approximately 10 meters away from the wall. Measure the height from the ground to the center of the headlight and the distance between the two headlights. Place a horizontal masking tape on the wall 0.1 meters lower than the headlight height, ensuring the tape is centered directly in front of the car. Turn on the headlights. Adjust the vertical adjustment screw until the headlight beam is centered on the tape on the wall. Continue adjusting the vertical screw until the beam is pointing straight ahead. To ensure correct adjustment, measure the height of the beam on the wall and the height of the headlight, making sure both values are the same. Definition of headlights: Night driving lights, commonly known as "headlights." Headlights have two modes: high beam and low beam. Use low beam on roads with streetlights in urban areas, and high beam on roads without streetlights or highways. When passing through intersections or overtaking, alternate between high and low beams to signal.
Actually, it's best to check the headlight alignment after replacing bulbs. Last time I changed a bulb myself without adjusting it, and only realized at night that the beam was noticeably tilted towards the curb—illuminating trees brightly while making the road hard to see. A repair shop mechanic taught me a simple method: at night, park the car three meters from a flat wall, turn on the low beams, and observe if the cutoff line is level and if both bulbs are symmetrically aligned. If misaligned, use a hex key to adjust the white gear knob at the back of the headlight—turning it clockwise raises the beam. Special reminder for those who've modified their lights, like switching from halogen to HID or LED: the beam angle changes more significantly, so readjustment is crucial to avoid blinding oncoming drivers.
