Under a common diffuser (4) incandescent reading lights (1 and 3), as well as a lantern for interior lighting (2).
With interior lamp removed (loosen the two screws on the middle reflector) switches are accessible on the reverse side (1 and 3) reading lights and switch (2) saloon lamp.
Such a door contact switch (1; dismantled here) located only on the rear doors under the rubber nozzle (2).
Left: In vehicles with make-up mirror lighting, the mirror insert can be gently pressed out (1) from the sun visor frame. Then the microswitch will be visible (2) and both soffit lamps (3 and 4) to illuminate the mirror.
Right: in the lighting of devices, the cartridge and the incandescent lamp form one structural element. There's a light bulb out here. Numeric «1» the location of the paws for instrument lighting is shown, with a number «2» 5 lights are indicated for lighting the on-board computer and control device.
Functioning
In the Audi A4, the function of the interior light is controlled by the central locking: The operation of the interior light is influenced by the central locking control unit as follows:
1. After the ignition key is removed, the interior lamp flashes.
2. When the car is opened, the interior lighting turns on.
3. When the ignition is turned on, as well as when the car is closed, the light turns off.
4. After closing the door, the light stays on for about 30 seconds, but only if the ignition was turned on or the central lock was activated before.
5. If the door is left open for more than 4 minutes, the interior lamp turns off.
Lantern lamps for interior lighting
1. Gently press the lamp diffuser out of the grooves and then remove the lamp from the housing.
2. When installing, insert the hooks on the reverse side into the cutout in the roof first.
3. Take out the soffit lamp (10 W, length 41 mm) from the cartridge.
4. With a combined reading lamp, remove the lamp with a glass base from the socket (5 W).
Door contact switch for interior lighting
The traditional door contact switches are no longer on the front doors of the Audi A4. Instead, a contact is integrated into the central locking servomotor «the doors are closed».
The situation is different with the rear doors: here a traditional contact switch is installed in the door opening. It sends a direct door position signal to the central locking control unit, just as the front door contact does. Malfunctions of this switch occur when:
- switch push pin jammed in guide or bent. Replace switch;
- the wire connector has fallen off the switch. In order to better hold the connector, bend it slightly and reinsert it;
- the contact surface of the switch with the fixing screw or the contacts of the connector are oxidized. Remove the oxide layer with sandpaper or a sharp screwdriver.
The door contact switch itself is screwed to the door post with only one Phillips head screw. To dismantle it, remove the rubber cap, unscrew the screw and remove the switch.
Rear Reading Lights
Just like the front reading lights, the rear lights can be set to the interior lights by changing the position of the switch, so the rear also benefits from interior lighting control. Bulb replacement:
1. Insert a screwdriver into the recess on the side of the lamp housing and carefully pry the lamp out.
2. After replacing the incandescent lamp, insert the lamp housing again - first with the side where the wire is.
Makeup mirror lighting
1. Carefully press the mirror insert out of the sun visor frame.
2. Remove this incandescent lamp from the socket.
3. Insert a new lamp.
Trunk light
Both luggage compartment lights are located on the left in the luggage compartment side trim and also, slightly hidden, in the cross panel under the rear window.
1. Open the hood.
2. Insert a screwdriver into the recess on the side of the lamp housing and carefully pry the lamp out.
3. After replacing the bulb (spotlight lamp 5 W, length 36 mm) insert the lamp body again - first with the side where the wire is.
Lantern for lighting the engine compartment
1. Slightly squeeze the lamp cover on the right and left and remove it.
2. The 10 watt bulb has a bayonet connection.
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