The dipped beam headlamps are controlled
by electronic Check device
M45
, which receives control signals
from the switches and controls the bulbs while also checking the various
lines.
The supply for the Check device
M45
arrives directly from the battery (maxifuse CENTR of
B5
)
at pins 1 and 6 of connector C, via fuse
F11
of junction
unit
B1
.
An ignition-operated power supply (INT/A)
reaches pin 9 of connector C through fuse
F1
of junction
unit
B1
: pin 7 of connector C is earthed.
The dipped beam switch on the exterior lights
control
H6
receives ignition-operated supply (INT/A) to
pin 7, through fuse
F13
of junction unit
B1
.
When the lights are switched on, the command
is sent via the stalk unit
H5
to pin 6 of connector B of
M45
.
In response to this signal, Check device
M45
controls the supply of the dipped beam headlamps, from pin 5 of
connector D, supplying a signal to pin 2 of connector B of
B3
. This
signal excites relay
R1
, located in relay unit B3 that supplies
power to headlamps
F10
(left) and
F11
(right).
Each circuit is protected by a fuse in the relay unit
B3
:
F6
for
the left headlamp and
F7
for the right headlamp.
The right headlamp supply line also lights
up the 'dipped beam headlamps on' warning lamp on the instrument
panel
E50
- pin 4 of connector A - while pin 16 of connector
A acts as an earth.