Chevrolet Metro 1999 Owner's Manual page 228

To check the aim, the vehicle should be properly
prepared as follows:
D
The vehicle must have all four tires on a perfectly
level surface.
D
If necessary, pads may be used on an uneven surface.
D
The vehicle should not have any snow, ice or mud
attached to it.
D
The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.
D
There should not be any cargo or loading of the
vehicle, except it should have a full tank of fuel and
one person or 160 lbs. (75 kg) on the driver's seat.
D
Close all doors.
D
Tires should be properly inflated.
D
Rock the vehicle to stabilize the suspension.
Start with the horizontal aim. The adjustment gear can
-
be turned with a flat head screwdriver.
6-36
A. "0" Mark
B. Center Line
C. Horizontal Aiming Gear
1. Verify that the black line is not at the "0" mark.
-
2. Using a flat tipped screwdriver, adjust the horizontal
aiming gear until the "0" mark lines up with
the centerline.
Once the horizontal aim is adjusted, then adjust the
vertical aim.
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