Fan
N85 is supplied when the ignition is switched on (INT/A)
from the line protected by fuse F31 of the junction unit B2 under
the facia and controlled by dedicated fuse F8 of engine bay control
unit B1.
Control knob
H81 controls the fan at
different speeds via regulator O30: the control signal - earth signal
- varies according to knob position and crosses or does not cross
the coils of regulator O30 to determine four different voltage signals
for fan N85, which thus turns at 4 different speeds.
The outside/recirculation air intake flap
motor
N82 is operated by a special button, located in the control
panel H80: the operation of the button sends an earth signal and
a supply controlled by the ignition (INT/A) protected by fuse F49
of underfacia control unit B2 which are reversed to reverse the
direction of rotation of the motor.