Porsche 928 S 1986 Driver Manual page 87

If your vehicle is equipped with asymmetrical
dipped beam headlights, and you travel a-
broad, where the traffic drives on the other side
of the road, you should stop at the border, and
blank off the prism section of the light diffusing
lens with opaque adhesive strip. The dipped
beams will then be symmetrical, and will not
dazzle oncoming drivers.
Manual operation of the headlights
If, by reason of a malfunction in the headlight
elevating motor, the headlights cannot be
raised or lowered, the knob on the driveshaft
of the elevating motor can be manually turned,
to raise or lower the headlights. To do this, re-
move the rubber cap from the drive motor. The
elevating system is so designed that, to raise
or lower the headlights, only one turn to the left
with the knob is necessary.
Do not try to turn the elevating motor knob
when the headlights are functioning nor-
mally from the light switch as they should,
because of the danger of being injured.
By virtue of the switching principle, the ele-
vating motor drives the elevating mechanism
another half a turn (180°). That is to say that
after several turns of the knob a contact is
closed so that when the headlights are func-
tioning normally, they go up and come down
immediately.
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