Many modern headlight systems can not be properly aimed manually (by
sight). A clamp on aiming device is needed to properly aim the
headlights. That's what the bumps and protrusions on the face of the
lenses are for, to properly orient and attach the aiming device to the
headlight. Of course, as with many aspects of automotive repair and
maintenance, just because there's a right way to do something, doesn't
mean all (or even most) shops use the proper procedure.

> I no longer live in Texas.  When I did, the headlight aiming involved a
> machine that was set in front of each headlamp, and the light was
> adjusted to a target (crosshairs) in the machine.  Thought that was how
> it was done everywhere.  David
>

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Marc Sayer
Journalist, Photographer, Dog Trainer (APDT member #062956)
Board member - Western States Great Dane Rescue Association
Director of Operations & Training - Deaf Dane Rescue Inc.
Oakridge, OR USA

My Homepage - http://gracieland.org
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