alignmyheadlights.com

How to Align Car Headlights Against a Wall?

To use this calculator, park your car on a level surface facing a flat wall, then measure two things: The distance from the ground to the center of your headlight bulb (the headlight height). The distance from the front of your headlights to the wall (the distance to wall). Enter these measurements into the calculator.

Why is Proper Headlight Alignment Important for Safety?

Correctly aimed headlights maximize your nighttime visibility and prevent dangerous glare for oncoming drivers. If your headlights point too high, they will blind other drivers and disperse the light beam, leading to poorer visibility on the road. If they point too low, your field of view is drastically shortened, preventing you from seeing road hazards in time.

Why Do Left and Right Headlights Have Different Target Heights?

To prevent blinding oncoming drivers, the headlight on the traffic-facing side of the lane is always adjusted to project slightly lower than the curbside headlight.

Which Headlight Should Be Adjusted Lower (LHD vs. RHD)?

For Right-Hand Drive (RHD) traffic conditions, the right headlight is adjusted lower. Conversely, Left-Hand Drive (LHD) vehicles have the left headlight adjusted lower to avoid oncoming traffic. Our calculator automatically applies this offset, reducing the throw distance of the traffic-side headlight by 5 meters (15 feet).

Where Are Headlight Adjustment Screws Located?

Most modern headlight assemblies have two adjustments: a vertical screw/bolt and a horizontal screw/bolt. These are usually located on the back or top of the headlight assembly housing, accessible by opening the hood (bonnet). Some cars require accessing them through access panels in the wheel wells.