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
)
to pins 1 and 6 of connector C, via fuse
F11
of junction
unit
B1
.
The supply controlled by the ignition (INT/A)
arrives via fuse
F1
of junction unit
B1
at pin 9
of connector C: pin 7 of connector C is earhed.
The dipped beam switch on the exterior lights
control
H6
receives ignition-operated supply (INT/A) to
pin 7, through fuse F1 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, the Check device
M45
controls the supply to the dipped beam headlamps from
pin 5 of connector D supplying a signal to pin 2 of connector B
of
B3
. This signal energizes the relay
R1
, located
in the relay unit
B3
which supplies the 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.