Rear window heating Niva Chevrolet

The diagram of the rear window heating system is shown in Fig. 1.

Fig. 1. Wiring diagram of the heater fan motor and rear window heating element: 1 - ignition switch; 2 - mounting block; 3 - heater motor switch; 4 - additional resistor; 5 - heater motor; 6 - rear window heating element; 7 - rear window heating switch with indicator lamp; A - to power source; K6 - additional relay; K7 - rear window heating relay

The glass heating element is switched on using relay K7 type 904.3747-10, installed in the mounting block.

To prevent the battery from being discharged by the heating element left on when the engine is not running, the heating can only be switched on when the ignition is on.

For this purpose, power is supplied to switch 7 via additional relay K6, which is triggered when the ignition is switched on.

Power is supplied to the heating element via fuse F8, directly connected to power sources.

If the rear door glass is not heated when the heating is switched on, check fuse F8, the wires and their connections, as well as switch and relay K7.