Cadillac 2007 XLR - Manual (Page 410)

Headlamp Vertical Aiming
To properly prepare the vehicle for vertical
headlamp aiming see Headlamp Aiming on
page 408 for more information.
To adjust the vertical aim, do the following:
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. Open the hood. See Hood Release on
page 373 for more information.
2. Locate the aim dot on the inner projector lens
of the low-beam headlamp.
3. Measure the distance from the ground to the
aim dot on each low-beam headlamp. Record
this distance.
4. At the wall or other flat surface, measure from
the ground upward (A) to the recorded
distance from Step 3 and mark it.
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. Draw or tape a horizontal line (B) on the wall
or flat surface the width of the vehicle at the
height of the mark in Step 4.
6. Turn on the low-beam headlamps and place a
piece of cardboard 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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