The dipped headlamps activation and AUTO function (earth) signal
is sent to pin 2 of connector I of the Body Computer
M1 from
the steering column switch unit H5. See E2011 DIPPED HEADLAMPS
.
The Body Computer
M1 controls the supply
of the dipped headlamps sending an earth signal to the underdashboard
control unit B2 - from pin 8 of connector F of M1 - which energizes
the relay T1: this supplies pin 1 for the dipped headlamps F10 (left)
and F11 (right).
at the same time, the enablement for the adjustment
motors is provided - pin 7 for the (left) headlamp
F10 and F11
(right);
Each circuit is protected by a junction
unit
B2 fuse F13 for the left headlamp and F12 for the right
one.
The headlamp adjustment control, located
in the control unit to the left of the steering wheel
H91, sends
a modulated control signal, each time the '+' or '-' buttons is
pressed, to the instrument panel E50, pin 14 of connector B. The
internal logic for E50 manages the function, sending the actual
control signal to the motors from pin 7 of connector A, whilst the
enablement signal reaches pin 8 (dipped headlamps on).
These control signal 'pass through' the
junction unit under the dashboard - pin 1 of connector A of
B2
and activate the motors - pin 6 for the (left) headlamp F10 and
F11 (right).