The headlamp alignment device in
H15
is supplied at pin 2 by a line coming from the circuit for the dipped
beam headlamps (
See E2011 DIPPED HEADLAMPS
);
this line provides voltage to the regulator only when the dipped
beams are on.
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, the Check
device
M45
controls the supply to the dipped beams - from
pin 5 of connector D. this signal excites relay
R1
, located
in relay unit
B3
that supplies power to dipped beams and
control
H15
via fuse line
F7
of
B3
.
Pin 3 of device
H15
is earthed,
while pin 1 sends an adjustment signal to the motors located in
light clusters
F10
(left) and
F11
(right). A resistance
divider alters output voltage to according to which of the four
positions has been selected.
Motors
N30
and
N31
contain
a transducer that establishes actual motor travel on the basis of
the voltage of an adjustment signal received by pin 2 from device
H15
.
The motors are supplied through pin 3 from the line (part of the
dipped beam circuit) that supplies device
H15
, while pins
1 are earthed.