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The headlight adjuster is located inside the headlight assembly and is used to adjust the headlights up and down. There are two types of headlight adjustment systems, one is manual and involves adjusting the headlight bolts that are above the headlight and on the side using a screwdriver to adjust the headlights up and down and sideways.
The other type is a motorised headlight adjuster. Like the bolt version, this headlight adjuster is also located in the headlight assembly. The movement of the headlights are controlled by a motor that is attached to the power supply, and can be adjusted using a switch inside the vehicle on the driverside to position the lights in all directions.
Failure of the headlight adjuster can mean that you are unable to adjust your headlights. If the adjuster ceases working, it’s possible that the headlight will move out of position. This can cause visibility issues when driving, and also could cause difficulties for other drivers on the road who could be blinded by too-high headlights. Poorly positioned headlights are also an MOT failure. It’s therefore essential to replace a damaged headlight adjuster as soon as possible.