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Fig.7-37. Wiring diagram for rear window wipe/wash and heating:
1 - fusebox; 2 - rear window wipe/wash switch; 3 - rear window washer motor; 4 - rear window wiper motor; 5 - rear window heating element; 6 - rear window heating
relay; 7 -warning light of heated rear window; 8 - rear window heating switch; 9 - ignition switch
Rear window wipe/wash and heating,
cigarette lighter
The rear window wiper includes a motor of 471.3730 model,
arm and blade. The wiper arm and blade have a right-hand park
position as viewed with the vehicle in forward motion. The motor
has a thermal bimetal fuse for overload protection.
The washer motor integral with the pump is secured on the
bracket to the left-hand bodyside panel.
The wiring diagram for rear window wipe/wash is shown in
Fig.7-37. The wiper is activated by push-button 2 located at the
left-hand side of the instrument panel. At the push-button middle
position only the wiper is activated, while at a fully depressed
push-button the rear window washer is operated too.
The motor design allows its dismantling to eliminate minor
faults (commutator cleaning, etc.). Dismantling and reassembly
methods are similar to those described earlier for the windscreen
wiper motor.
The rear window wiper should operate at (50±5) rpm (double
sweeps) at a load of 0.49 N•m (0.05 kgf•m), supply voltage of 14
volts, ambient temperature of (25±10)°ë and maximum consump-
tion current of 2 amperes.
The rear window heating is activated by switch 8 through
supplementary relay 6 (113.3747-10 model), fitted at the left-
hand side of the instrument panel. Refer to «Lighting and sig-
nalling» for details.
Fig.7-38. Wiring diagram for heater blower motor:
1 - ignition switch; 2 - fusebox; 3 - heater blower switch; 4 - supplemental resistor; 5 - heater blower motor
162
The cigarette lighter (11.3725 model) is provided with protec-
tion against extended operation (over 30 seconds) of the heating
element by means of a fusible washer secured on the insulator at
the rear of the cigarette lighter. When overheated the washer
melts and closes the central lighter contact to earth. This results
in a blown fuse No5 in the supplementary fuse box and discon-
nected cigarette lighter.
To restore the cigarette lighter operation, eliminate the cause
of its lengthy operation, dismantle the cigarette lighter, remove
the melted washer and fit a new safety washer.
Heater blower motor
It is a motor of åù-255 model, DC, on permanent magnets.
The motor wiring diagram is shown in Fig.7-38.
For slower speeds there is supplemental resistor 4. The resis-
tor is retained by two spring washers in the heater blower fan
cowl. The resistance value is 1.5 Ohms at 20°ë.
Always renew a faulty motor with a new one. The only repair
possible is the commutator cleaning.
To dismantle the motor, undo the retaining screws to remove
the cover. Then retrieve the lock washer from the armature shaft
and withdraw the armature from the housing. The reassembly is
carried out in the reverse order to the dismantling.
Inspect the motor in the way similar to that for the windscreen
wiper motor.
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