Headlamp Aiming - Screen Method

Figure 2

Headlamp aiming by the screen method requires a level floor (or leveling pads) area in a darkened location, sufficient for the vehicle and an additional 25 feet from lamps to screen. The vehicle MUST be located accurately in front of the screen. Refer to "Visual Headlamp Aiming Procedure (Preferred)" in this bulletin for details about setting up this test properly. Preparation of the vehicle is similar to the Mechanical Headlamp Aiming Method.


Upper Beam Replaceable Bulb(Type 9005 (HB3) Used Above)

Equipment: Marked screen and adequate test area. Procedure: With the vehicle properly located and loaded, switch headlamps to upper beam and observe center of high intensity zone on the screen.

Reject Vehicle: If center is horizontally more than:
- 102mm (4 inches) RIGHT of straight ahead.
- 102mm (4 inches) LEFT of straight ahead.
Reject Vehicle: If center is vertically more than:
- 102mm (4 inches) ABOVE the horizontal line.
- 102mm (4 inches) BELOW the horizontal line.

Low Beam Replaceable Bulb (Type 9005 (HB3) and Type 9006 (HB4) Together)

Equipment: Marked screen and adequate test area. Procedure: With vehicle properly located and loaded, switch headlamps to low beam and observe left and top edges of high intensity zone on the screen.

Reject Vehicle: If left edge is horizontally more than:
- 102mm (4 inches) LEFT of straight ahead.
- 102mm (4 inches) RIGHT of straight ahead.
Reject Vehicle: If top edge is vertically more than:
- 102mm (4 inches) ABOVE the horizontal line.
- 102mm (4 inches) BELOW the horizontal line.

IMPORTANT: Always inspect the following sealed beam and replaceable bulb headlamps on "low beam" only.

- Replaceable bulb headlamps with Type 9006 (HB4) alone or in combination with Type 9005 (HB3).