Pontiac 2003 Bonneville Owner's Manual page 314

4. Turn on the low-beam headlamps and 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.
Norice: DO
noi cover a
heariiarnp iu iii-lpi-uie
5386~
cut-off when aiming. Covering a headlamp may
cause excessive heat build-up which may cause
damage to the headlamp.
5. Turn the vertical aiming
screw (C) until the
headlamp beam
is aimed to the
horizontal tape line.
The top edge of
the cut-off should be
positioned at the
bottom edge of the
horizontal tape line.
6. Repeat Steps 4 and 5 for the opposite headlamp.
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