Cadillac seville 2002 ユーザーズマニュアル

Your vehicle has a visual optical headlamp aiming
system equipped with horizontal aim indicators. The
aim has been preset at the factory and should need no
further adjustment. This is true even though your
horizontal aim indicators may not fall exactly on 
the “0” (zero) marks on their scales.

If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low beam
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 your
headlamps need to be re

-

aimed, we recommend that 

you take your vehicle to your dealer for service.
However, it is possible for you to re

-

aim your

headlamps as described in the following procedure.