Aiming Screen

Perform the following steps to set up the aiming screen:
1. Ensure that the screen includes the following provisions:
- Is 1.5 m (5 ft) high and 3.6 m (12 ft) wide
- Has a matte white surface well shaded from extraneous light
- Is properly adjusted to the floor on which the vehicle stands
2. Make provisions for moving the screen so that it can be aligned parallel with the rear axle.
3. Make provisions for moving the screen so that a horizontal line drawn perpendicularly from the centerline of the screen will pass an equal distance midway between the two headlamps.
4. The screen is provided with the following components:
- A fixed vertical centerline
- Two laterally adjustable vertical tapes
- One vertically adjustable horizontal tape
5. If a regular commercial aiming screen is not available, the screen may consist of a vertical wall having a clear uninterrupted area of approximately 1.8 m (6 ft) high and 3.6 m (12 ft) wide.
Finish the surface with a washable non-gloss white paint.
6. After the aiming screen has been set up, paint a reference line on the floor directly under the lens of the lamps in order to indicate the proper location of the headlamps when they are being aimed.