14. BRAKE LIGHTS / CAB AIR SUSPENSION
BRAKE LIGHTS
If the brake pedal is pressed, brake light controlswitch E511 is activated and the relay (G036)
will be activated. A voltage will be applied to the
right- and left-hand vehicle brake lights (C021
and C020 respectively) and they will light up.
The lights connected through trailer connector
socket A000 will also light up.
A voltage will also be applied to the CTE unit
(13/232) through diode D722. A voltage is also
applied to connection point 5 of relay G297 (cab
air suspension) through diode D759.
CONTINUOUS BRAKE (engine brake)
If the engine brake control switch (E564) is
activated, a voltage is applied to connection
point 14. As a result, connection point 55 is
activated causing engine brake valve B192 to
become activated.
Connection point 55 is only connected to the
supply voltage if:
- The engine speed exceeds 700 rpm.
- The rear wheels do not block in an
ABS-equipped vehicle.
CAB AIR SUSPENSION
A voltage is applied to both the cab lock sensor
(F616) and relay G297 through fuse E030 and
wire 1104. If the cab is tilted, points 2 and 4 in
the cab lock sensor (F616) are connected. As a
result, relay G297 (cab air suspension relay) is
activated through wire 3412 and the cab lock
sensor (F616). The contacts of relay G297 close
(connection between contacts 3 and 5). A
voltage is now applied to valve B294 causing
this valve to become activated as well.
VARIANTS
Location
12,14,16 Connector 495 is only used in the case
of an FA version. In FT versions, wire
4601 (to C021 and C022) and earth do
not run through connector 495.
20 Connector A000 is only used in the
case of an FA. In FT versions,
connector A002 is used.
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