"sdlomi2" > wrote in message
...
>

> > DS
> I must say, Daniel, that I've never seen this technique before. I
have
> used walls as a reference for trial-and-error; but, thanks for the info--I
> like it. sdlomi2

I have used a slightly different method whereby the centerpoints of the
windshield and backlight
are used, and a laser pointer through those points establishes the
centerpoint on the wall. Measured height from from floor level to lamp
center is transferred to the wall. , as is measured distance between two
headlight centers.

Distance from car to wall is still 25 feet.

Object is to get the high intensity beams concentrated around the
intersection of the level line
and the beam line, and the low intensity spot below the level line and to
the right of the beam lines.
It is somewhat subjective, but with a little practice can be done well
enough for most applications.

The last time I had to do this, the 'dealership' had adjusted my beams, and
had one pointed toward Mars and the other toward the nether zones. The
above procedure worked well enough
to pass the inspection examination (which used expensive equipment).