5
Electrical installation
ELECTRICAL INSTALLATION
2-95
22. SIGNAL HORN / CIGARETTE LIGHTER / WORK LIGHT / AIR DRYER
SIGNAL HORN
The signal horn on this vehicle is a so-called
electropneumatic signal horn.
It consists of an electrically controlled air valve
and a diaphragm.
If the signal horn is engaged by activating switch
C775 (connection between contacts 8 and 9), a
voltage will be applied to the air-horn valve
(B028) through fuse E030, wire 1104, switch
C775 and wire 4535. The air horn will
subsequently be activated.
CIGARETTE LIGHTER
If heating element B030 of the cigarette lighter is
activated, the heating element in the cigarette
lighter is heated. When the switch heating
(C622) is activated, both the ashtray lighting
(C072) and the rim around the cigarette lighter
will light up.
WORK LIGHT
If the contact is positioned in or past the
accessory position, the work light (C071) can be
lit using switch C725. The light is fed through
fuse E307 and accessory relay (G178). This
relay is activated, after which the voltage is
applied to both the work-light switch (C725) and
the work light (C071) through fuse E052
(work-light fuse). At the same time a warning
lamp on the DIP is also activated.
AIR DRYER
If the contact relay (G015) is activated, a
voltage will be applied to connection point 1 of
air dryer B042 through fuse E091 and wire
1240. Pin 4 is connected to earth. Depending on
the temperature, the air dryer heating element is
switched on or off.
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