The special switch for the steering column switch unit
H5 controls
the operation of the rearscreen wash/wipe.
The stalk unit
H5 is supplied
at pin 3 of connector D from the ignition-operated line (INT/A)
of the relay R1 protected by the fuse F14: both are contained in the junction unit B1.
The supply for the relay R1 comes from the
direct line of the maxifuse
J/B1 of B5,
whilst the coil is supplied by the line (INT/A) protected by the
fuse B26.
When operated, the rearscreen wash/wipe
switch for the steering column switch unit
H5, sends
the control signals, from pins 1 and 2 of connector D, to the device
inside the motor N16 (pins 1 and 3) which regulates
the operation of the rearscreen wiper.
The motor
N16 is then connected
to earth through pin 2.The rearscreen wiper unit consists of the
actual geared motor, the end of travel contacts and the control
relay.
When operated, the rearscreen washer switch
sends two signals from pins 8 and 9 of connector A for
H5 which
reach the pump for operating the rearscreen washer N22
directly
(the operation is the reverse of the windscreen washer function
See
E3020
WINDSCREEN WASH/WIPE
).