Cadillac 2005 DeVille, Owner'S Manual, Page: 318 / 416

Headlamp Vertical Aiming
Notice: Horizontal aiming must be performed
before making any adjustments to the vertical aim.
Adjusting the vertical aim first will result in an
incorrect headlamp aim.
1. Find the aim dot on the lens of the low-beam lamps.
2. Measure the distance from the ground to the aim
dot on each lamp; if left low beam, subtract
2 inches (5 cm). Record this distance.
3. At the wall or other flat surface, measure from the
ground upward the recorded distance from Step 2
and draw or tape a horizontal line the width of
the vehicle.
4. Turn on the low-beam headlamps.
Notice: Do not cover a headlamp to improve beam
cut-off when aiming. Covering a headlamp may
cause excessive heat build-up which may cause
damage to the headlamp.
5. Place a piece of cardboard or equivalent in front of
the headlamp not being aimed. This should allow
only the beam of light from the headlamp being
aimed to be seen on the flat surface.
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