Aiming Screen

If a screen is used, it should be at least 1.52 m (5 ft.) high by 3.66 m (12 ft.) wide with a matte white surface well shaded from ambient light and properly adjusted to the floor on which the vehicle stands. The screen should be moveable so that it can be aligned parallel with the rear axle of the vehicle. It should be positioned so that a horizontal line will pass an equal distance midway between the two headlamps.

The screen should be provided with a vertical centerline, two laterally adjustable vertical tapes, and one vertically adjustable horizontal tape.
If a regular commercial aiming screen is not available, the screen may consist of a wall having a clear uninterrupted area at least 1.83 m (6 ft.) high by 3.66 m (12 ft.) wide. The surface should be finished with a washable no-gloss white paint.

After the aiming screen has been set up and located, paint or tape a reference line on the floor 7.62 m (25 ft.) from the screen. The vehicle should be parked with the front of the headlamps directly over this reference line.