headlamp PORSCHE 911 GT3 2004 5.G Owners Manual

Adjusting Headlights

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Please observe thechapter "LIGHTS, REPLAC-
ING BULBS" onPage 162.
Adjustment
The adjustment ismade withthevehicle readyto
drive andthefuel tank completely filled.
The driver's seatmust beloaded byaperson ora
165 Ibs.(75kg)weight andthetire pressures
must meet theprescribed values.
After being loaded, thecarmust berolled afew
meters sothat thesuspension cansettle. For
checking theheadlight adjustment, theverti-
cal position ofthe cutoff ofthe lowbeam (seefig.)
has tobe projected onavertical screen(wall)in
distance of7.5 mfrom thefront lensofthe head-
lamp.
The correct position ofthe cutoff is5cm at7.5 m
(0.4°) below ahorizontal line,xcm from ground to
the center ofthe headlamp lens. Lateral
adjustment ofthe headlights shouldbe
carried outataspecialist workshop withanoptical
adjustment unit.

Distance

Visual aimshall beperformed atnot less than
7.5 m(this value isarounded downconversion
from the25-foot distance typicaloffield aimusing
a screen). The7.5mdistance ismeasured from
the headlamp lenstothe viewing screen.

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Practical Tips,Emergency Service
175

Floor

The surface uponwhich thevehicle restsisflat
and approximately level.

Screen

The screen uponwhich headlamp beams arepro-
jected isperpendicular tothe floor andthevehi-
cle's longitudinal axis,flat,uniformly lightincolor,
unobstructed, andwide andhigh enough toac-
commodate thevehicle beampatterns tobe
aimed.
The screen shouldbewide enough toprovide at
least 1m of space outboard ofthe vehicle's head-
lamp spacing.

176
PracticalTips,Emergency Service
Adjustment
screws
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Detach sidecarpeting inluggage compart-
ment.
Therefore unscrewplasticnut
A.

Open thecover ofthe appropriate adjustment
screw.
The setting isadjusted byturning thehexagon
socket screws rightorleft, asappropriate.
B

-Headlight verticaladjustment

C -
Fog light height adjustment

Vertical adjustment (screwB)
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turn clockwise
=
beam moves down
turn counter-clockwise
=
beam moves up

Note
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Donot alter thelateral adjustment.

Fog light adjustment

The foglight adjustment Cshould onlybedone at
a specialist workshop withanoptical adjustment
unit.