Porsche 928 S4 – Owner’s Manual

 

Model Year

1987

 

 

 

 

 

 

 

 

Contents

 

 

 

 

 

 

 

 

 

 

 

From the “Porsche 928 S4 Owner’s Manual”, available from 928 Specialists.

 

928 S4 page

 

John Pirtle

 

 

 

 

 

 

 

 

Replacing Bulbs

 

To avoid short circuits, turn off the respective electrical components when changing light bulbs.

 

Keep bulbs free of grease and dirt.  Hold them only with a clean cloth or soft paper.

 

Do not use chemical cleaning agents for the plastic lenses.  Plastic lenses should only be cleaned with water or a mild soap/water solution.

 

We recommend you keep an assortment of spare bulbs in the car.

 

When traveling abroad, remember that some countries require spare bulbs as part of the safety equipment.

 

 

 

Headlights

 

  1. Turn the ignition on.

 

  1. Turn light switch to position 2 to raise the headlights.

 

  1. Turn the ignition off.

 

  1. Unscrew the 3 Phillips screws and remove headlight cover.

 

  1. Turn holder of defective bulb anticlockwise to limit stop and remove.

 

  1. Unplug wires, replace bulb and reconnect the wires.

 

  1. Reinstall bulbholder.  Be sure that guide pins on bulb base fit into socket of reflector.  Turn bulbholder clockwise to limit stop.

 

  1. Check functioning of bulb and adjust headlights.

 

  1. Reinstall headlight cover.

 

 

 

Additional Headlights

 

  1. Remove cover of rubber buffer.

 

  1. Remove Phillips screws from rubber buffer and the transparent side cover with a screwdriver.

 

  1. Remove Phillips screws holding the lamp and pull out the lens as a unit.

 

  1. Disconnect wire.  Push down holding clamp for bulb.

 

  1. Remove defective bulb and replace.  Be sure guide pins on bulb base fit into socket of reflector.

 

  1. Reinstall lamp, tighten screws.  Check functioning and adjustment of light.

 

  1. Install rubber buffer and side cover and tighten retaining screws.

 

 

 

Tail lights

 

The tail lights are housed in one unit.

 

A – tail lights

B – stop light

C – turn signal light

D – back-up light

 

  1. Remove tool tray from the rear cross wall inside luggage compartment.

 

  1. Use the spark plug spanner to unscrew the hex nut which holds the tail light unit in place and remove the unit from the rear bumper.

 

  1. Turn holder of defective bulb anticlockwise to limit stop and remove bulbholder.

 

  1. Remove bulb from bulbholder and fit new bulb.  Reinstall bulbholder and turn clockwise to limit stop.

 

  1. Install tail light unit in bumper and tighten retaining nut.  Do not overtighten.

 

  1. Check function of light.

 

 

 

Front turn signal lights

Front parking lights

 

  1. Remove screws holding the lens and remove lens.

 

  1. Remove bulb from bulbholder and fit new bulb.

 

  1. Reinstall lens, tighten screws.  Check functioning of light.

 

  1. Install plastic trim and tighten retaining screws.

 

 

 

Additional stop light

 

  1. Remove Phillips screws from light unit and remove unit.

 

  1. Lightly pull lens out and replace defective bulb.

 

  1. Check functioning of light.

 

  1. Reinstall lens and light unit.  Tighten retaining screws.

 

 

 

License plate lights

 

  1. Unscrew both screws and lift out lamp housing.

 

  1. Replace bulb.

 

  1. Reinstall lamp housing and make sure it is firmly seated.

 

  1. Check light.

 

 

 

Interior lights

 

The following description applies to the dome lights, courtesy lights and the luggage compartment light:

 

  1. Insert screwdriver in cut-out on headliner and carefully pry out the lamp housing.

 

  1. Remove defective bulb between contact springs and insert new bulb.

 

  1. Insert one side of the lamp housing into cut-out and press firmly on the other side.  Light unit will snap into place.

 

 

 

Ashtray light

 

  1. Remove the two screws in ashtray housing and pull the housing upward and out.

 

  1. Slide bulb holder out of the housing and replace defective bulb.

 

  1. Slide bulb holder back into housing and check light by turning on the ignition.

 

  1. Reinstall the ashtray housing.

 

 

 

Headlight adjustment

 

Headlight adjustment should be done with a headlight aiming device under the following conditions:

 

At curb weight of car (i.e. car ready for use and with full fuel tank).

 

Driver’s seat should occupied by a person or a weight of approx. 155 lbs (70 kg).

 

Tire pressure must be correct.

 

Roll car forward a few feet so that the suspension settles into normal position.

 

 

  1. Remove cover of rubber buffer.
  2. Remove Phillips screws from rubber buffer and the transparent side cover with a screwdriver.

 

 

Adjustment screws

 

Each headlight and each additional headlight has two adjusting screws.  One for lateral and one for vertical setting.  Each fog light has one adjust screws for vertical adjustment.  By turning these screws left or right, the corresponding beam position is effected.  Each fog light has one adjusting screw for vertical adjustment.

 

Screw “a” (lateral adjustment)

 

right turn = beam moves right

 

Screw “b” (vertical adjustment for headlight and fog light)

 

right turn = beam moves up

left turn = beam moves down

 

Screw “b” (vertical adjustment for additional headlight only)

 

right turn = beam moves down

left turn = beam moves up

 

 

 

 

 

Manual Operation of Retractable Headlights

 

If the retractable headlights do not work automatically, they can be opened manually by turning the knob on the end of the motor drive shaft.  To do this, remove the rubber cap from the driving motor.  The connecting rod assembly is designed in such a way that it need only be turned to the left to either raise or retract the headlights.

 

WARNING

Do not turn the knob on the drive shaft as long as the automatic mechanism is operating.  The motor may turn suddenly and cause injury.  Before turning the knob, check whether the motor will work with the ignition in position 1 or 2 and the light switch in position 2.

 

 

 

 

 

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