What is the reason for no response in headlight left-right adjustment?

[LaLucy]

No response in headlight left-right adjustment is due to the malfunction of the internal adjustment motor in the headlight, and replacing the motor can solve the issue. Below are specific details about headlight adjustment: Precautions: It should be noted that the width of the headlights is generally preset at the factory, and self-adjustment is not recommended. If there is any deviation, minor adjustments can be made. During adjustment, the right headlight beam can be slightly adjusted to the right, which can provide better visibility of the right side of the road during low-visibility conditions such as rain or fog. However, it is more advisable to have a professional adjustment done at a 4S shop or repair shop. Adjustment Method: Park the car 10 meters away from a wall, measure the distance from the car's low beam to the central axis, the distance from the high beam to the central axis, and the distance from the low beam to the ground. Then move to the wall and mark the corresponding points on the wall. Next, observe whether the headlight beams are offset left or right or too high or low. If the center of the headlight beam does not align with the marked points, it indicates an offset. This can be adjusted by rotating the headlight width adjustment knob to align the center of the headlight beam with the marked points on the wall.

[DePeyton]

I've been driving for over 20 years. In the past, when headlight left-right adjustment didn't work, it was often because the adjustment motor failed. This small motor is responsible for rotating the headlight bracket and tends to get stuck or burn out over time. Additionally, manual switches may age and cause poor contact - when you press them, the signal doesn't get through. Then there are the connecting wires that can loosen or break due to excessive vibration. Once, my car's fuse blew due to excessive current, which protected the circuit but disabled the adjustment function. If these simple checks don't work, you need to examine whether there's an issue with the vehicle's lighting control module. In any case, don't delay when encountering such problems - go straight to a professional repair shop to avoid driving at night with misaligned lights that could lead to accidents due to poor visibility. Safety first. During regular maintenance, have the mechanic check the adjustment system too - prevention is better than cure.

[VanKira]

As someone who has worked in a repair shop, I can tell you that the inability to adjust the headlights left and right is mostly due to electrical faults. The fuse is a common culprit, usually located in the fuse box corresponding to the headlight adjustment slot—just check if it's blown and replace it if necessary. Short circuits or open circuits in the wiring can also block signals, especially with aged cables near the chassis, which are prone to issues when water gets in during rain. Another major cause is loose control button interfaces; poor contact in the connectors prevents current flow. If all the above checks out, the adjustment motor inside might be burnt out and need replacement. When repairing, using a multimeter to measure voltage is the most accurate method—don’t tamper with it if you’re unsure, to avoid damaging the car. It’s advisable to fix it early to prevent misaligned headlight beams from affecting driving visibility and causing hazards.

[OAliyah]

The headlight angle adjustment isn't working, which is quite annoying. First, try checking if the switch is stuck or dirty – cleaning it might solve the issue. The adjustment motor is located behind the headlight cover; you can feel around to see if the connector is loose. Unstable battery voltage might also interfere with the adjustment function, so check the battery condition. If that doesn't help, visit a 4S shop or auto repair shop to have the fuses and wiring inspected. Though it's a minor issue, delaying repairs can lead to light scattering, which is unsafe.