Rear door glass heating system Niva Chevrolet

Scheme of the tailgate glass heating system is shown in fig. 1.

The glass heating element is switched on by means of the K7 relay type 904.3747-10 installed in the mounting block

Fig. 1. Scheme of switching on the electric motor of the heater fan and the rear window heating element: 1 - ignition switch; 2 - mounting block; 3 - heater motor switch; 4 - additional resistor; 5 - heater electric motor; 6 - rear window heating element; 7 - switch for heating the rear window with a control lamp; A - to power supplies; K6 - additional relay; K7 - rear window heating relay

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

For this, power is supplied to switch 7 through an additional relay K6, which is activated when the ignition is turned on.

Power is supplied to the heating element through fuse F8, directly connected to the power supplies.

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