GMC Chevrolet Camaro 1998 Service Manual page 358

8-116 Lighting Systems
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294751
Body and Accessories
Vehicle Preparation
Prepare the vehicle for inspecting the headlamp
beam aim.
1. Perform the following to ensure an accurate
headlamp aim.
1.1 . Completely assemble all of the components
on the vehicle.
1.2. Ensure that the fuel load is 1/2 tank or less.
1.3. Ensure that the only other load in the
vehicle is the driver.
1.4. Mark the center of the front and rear
windows with narrow tape.
Use these sights to locate the center of the
vehicle.
1.5. Do this by moving the vehicle or the screen
until the center line (2) of the screen comes
into alignment with the two points.
1.6. Close the doors.
1.7. Rock the vehicle sideways in order to
stabilize the suspension.
2. Position the vehicle so that the vehicle is square
with the aiming screen.
3. Position the headlamps directly over the reference
line (7) ,hat you painted on the floor.
4. Locate the vertical line (4) on the aiming screen
so that the vertical lines meets the following
criteria:
• The vertical line is aligned with the center of
the rear window.
• The vertical line is over the hood.
Domestic Low Beam
Check the following for the low beam headlamps.
1. With the low beams on, observe the beam's high
intensity zone on the screen.
2. To adjust the headlamp aim perform the following:
• For the horizontal aim the left edge of the
high intensity zone should be on the vertical
axis (1), or within +102 mm (+4.0 in) (3), or
(4) -102 mm (-4.0 in) of the vertical axis (1).
• For the vertical aim the top edge of the
high intensity zone should be on the horizontal
axis (2), or within -63.5 mm (-2.5 in) (5), or
+51 mm (+2.0 in) (6) of the horizontal axis (2).
3. If the above specifications are not met adjust the
headlamps accordingly.
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