Headlight Adjustment - Porsche 928 S 1986 Driver Manual

Headlight adjustment

Your Porsche is fitted with a headlight beam
adjustment device inside the vehicle, so that
optimum headlight illumination can be obtained
irrespective of the loading of the vehicle, and
without dazzling oncoming drivers.
The basic adjustment of the headlights can
only be performed on a special machine. This
should be carried out on the vehicle in a ready
to drive condition, and a full fuel tank. The dri-
ver's seat must be loaded with a 75 kg weight,
or with a person, and the tyres must be inflated
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Upper adjustment screw = lateral adjustment
Lower adjustment screw = vertical adjustment
to the manufacturer's specifications. With the
vehicle in this condition, it must be rolled se-
veral meters to allow the road springs to settle,
before starting to adjust the lights.
The adjuster knob for the interior headlight
setting must be in the neutral position, i.e. the
white mark on the knob directly over the mark
" O " on the rosette (see headlight beam regu-
lator). To adjust the headlights, the screws
must be removed from the headlight housings,
and the housings removed.
Adjusting screws
Each headlight has two adjusting screws, one
for lateral setting, and one for vertical. By turn-
ing these screws left or right, the correspond-
ing adjustment in beam position is effected.
Adjustment of auxiliary driving lamps
The auxiliary driving lamps are adjusted such
that the centre of the light beam is the same
height as the centre of the lamp.