Pontiac FIREBIRD 1972 Service Manual page 1330

1972 PONTIAC SERVICE MANUAL
Fig. 12-66 A Series Front Lamps Installation
This device is equipped with an adjustment
screw and spirit level for adjusting to a vertical
plane, thus eliminating a need for a perfecly
vertical surface to mount the aimers for calibra-
tion and a calpenter's level. In addition, cali-
bration will probably be more accurate since
the calibration ring seats 3 platforms on the
face of the aimer where the sealed beam guide
points rest (and any wear occurs) when aiming
headlamp.
HEADLAMP AIMING
-
VISUAL
-
SCREEN METHOD
If it becomes necessary to aim headlights by the screen
method, the following specifications are recommended.
However, some states have special requirements for head-
light aim adjustment and these requirements should be
observed.
Low Beam
Place vehicle on a known level floor 25 feet from aiming
screen or light colored wall.
Four lines are required on screen or wall (Figs. 12-78 and
79).
1. A horizontal line "2" at the level of centers of head-
lights.
2. A center vertical line "4" which must be lined up
with vehicle center line. A good method is to sight
through rear window and align center of rear window
molding through mirror bracket or hood centerline.
3. A vertical line on left of screen or wall "3" in line
with center line of left headlamp.
4. A vertical line on right of screen or wall "5" in line
with center line of right headlamp.
Adjust low beam pattern "1" of headlights as shown
in Fig. 12-78.
High Beam (0 and A Series)
Adjust high beam pattern "1" of headlights as shown in
Fig. 12-79.