Headlamp Aiming - Buick 2005 Century Owner's Manual

Headlamp Aiming

The vehicle has a headlamp system equipped with
horizontal and vertical aim indicators. The aim has been
pre-set at the factory and should need no further
adjustment. This is true even though the vertical and
horizontal aim indicators may not fall exactly on
the "0" (zero) marks on their scales.
If the vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment may be
necessary if it is difficult to see lane markers, for
horizontal aim, or if oncoming drivers flash their high
beams at you, for vertical aim. If you believe the
headlamps need to be re-aimed, we recommend that
you take it to your dealer for service; however, it is
possible for you to re-aim the headlamps as described
in the following procedure.
Notice: To make sure your headlamps are aimed
properly, read all the instructions before beginning.
Failure to follow these instructions could cause
damage to headlamp parts.
To check the aim, the vehicle should be properly
prepared as follows:
•
The headlamps must be off for one hour prior to
aiming and must remain off during this procedure.
•
The vehicle must have all four tires on a perfectly
level surface.
•
If necessary, pads may be used on an uneven
surface to help level the vehicle.
•
The vehicle should not have any snow, ice or mud
attached to it.
•
The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.
•
There should not be any cargo or loading of the
vehicle. It should however, have a full fuel tank and
one person or 160 lbs (75 kg) on the driver's seat.
•
Close all doors.
•
Tires should be properly inflated.
•
Rock the vehicle to stabilize the suspension.
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