The washer motor, combined with the pump, is mounted on a bracket to the left side panel of the body.
The scheme of connections of a cleaner and a washer of back glass is shown in fig. 7-37. The cleaner is switched on by the key switch 2, located on the instrument panel on the left side. When the key is in the middle position, only the wiper is turned on, and when the key is fully pressed, the rear window washer is also turned on.
Pic. 7-37. Scheme of switching on the cleaner, washer and rear window heating element:
1 - fuse box; 2 - switch for the rear window cleaner and washer; 3 - rear window washer motor; 4 - rear window cleaner motor; 5 - rear window heating element; 6 - relay for turning on the heating of the rear window; 7 - control lamp for heating the rear window; 8 - rear window heating switch; 9 - ignition switch.
The design of the geared motor allows it to be disassembled to eliminate minor malfunctions (collector cleaning, etc.). The disassembly and assembly methods are the same as those described above for the windshield wiper gearmotor.
At the rear window cleaner when the gearmotor is loaded with a torque of 0.49 Nm (0.05 kgf·m), supply voltage 14 V and ambient temperature (25±10) °С the number of double strokes of the gearmotor shaft must be (50±5) min-1, and the current consumption is not more than 2 A.
The rear window heating element is switched on by switch 8 using an auxiliary relay 6 of type 113.3747-10, installed under the instrument panel on the left side. Relay characteristics are given in subsection «Lighting and light signaling».
The cigarette lighter type 11.3725 has protection against prolonged (over 30 s) turning on the heating element. Protection is provided by a fusible washer attached to the insulator on the back of the cigarette lighter. When overheated, the washer melts and closes to «mass» central contact of the cigarette lighter. As a result, the No. 5 fuse in the auxiliary fuse box blows, and the cigarette lighter turns off.
To restore the cigarette lighter to work, it is necessary to eliminate the cause of the long-term activation, disassemble it, remove the remains of the melted washer and install a new safety washer.