Cadillac 2000 Seville Owner's Manual page 315

Headlamp Horizontal Aiming
Headlamp Vertical Aiming
1. Find the aim dot on the lens of the lamps.
Turn the horizontal aiming
screw (A) until the indicator
(B) is lined up with zero.
Once the horizontal aim
is adjusted, then adjust
the vertical aim.
2. Measure the distance from the ground to the aim dot
on each lamp. Record this distance.
3. At the wall or other flat surface, measure from the
floor to the recorded distance and draw a horizontal
line the width of the vehicle.
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