The main beams 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 at pin 1 of connector C and 6 of connector
E via fuses F17 and F15 of junction unit B2 for the right and left
branches of the lights, respectively.
The ignition-controlled supply (15/54) arrives
via relay
T1 and fuse F9 of junction unit B2 at pin 3 of connector
B: pin 8 of connector C is earthed.
The N.A. contact of switch
I30 is supplied
when the ignition is turned on (15/54) from fuse line F1 of junction
unit B2:when the brake pedal is pressed, the switch closes and sends
the operation signal to pin 2 of connector B of M45.
The check device also controls - pin 8 and
pin 5 of connector B - the supply to the lateral stop lights in
the rear lights clusters
F30 ed F31.
and from pin 12 of
connector B of the central rear cluster
F40.
The device
M45 checks the efficiency
of the bulbs and their connections: if faults are detected in the
circuit, the 'lights fault' warning light on the instrument panel
E50, pin 7 of connector C, is lit from pin 6 of connector A.
In this specific case, the control unit
also checks the supply line of switch
I30
, and if necessary
indicates any faults.