Volkswagen The Golf 2004 Service Training page 27

Tail lights
Installed for the first time in the Golf 2004 are
the split rear lights with round elements, which
are comprised of several elements.
The light unit integrated in the side panel is
responsible for the tail, brake and turn signal
light functions.
Installed in the tailgate is a fog light on the left
and a reverse light on the right.
The auxiliary brake light in the roof spoiler and
turn signals mounted in the exterior mirrors
complement the headlight and rear light
functions and provide an additional visual aid
for other road users.
Actuation of the light functions
The rotary light switch is a powerless
semi-conductor module, which sends information
about the switch position, in the way of signals,
to the onboard supply control unit.
The onboard supply control unit controls all of
the relevant exterior light functions.
Tail light
Tail and brake lights
Turn signal light
Advantages
Voltage peaks in the light switch are avoided
to increase longevity of the bulbs
Special functions:
The bulb monitoring system can be displayed
visibly in the dash panel insert
S319_056
Rear fog light
27