Pic. 152. Scheme of switching on the electric motor of the heater and the heating element of the rear window: 1 - mounting block (fragment); 2 - relay for turning on the heating of the rear window; 3 - ignition switch (fragment); 4 - heater motor switch; 5 additional resistor; 6 - heater electric motor; 7 - rear window heating switch; 8 - a combination of devices with a control lamp for heating the rear window (fragment); 9 - rear window heating element
It is recommended to replace a defective electric motor with a new one. The only possible repair is cleaning the collector. There is no need to remove the electric motor from the vehicle for this. It is enough to remove the protective cap, and then the cover with the brush holder by unscrewing the two fastening screws.
Brief technical characteristics of the electric motor:
- Shaft speed with rotor load (or torque 0.022 kgf-m) at a voltage of 12 V and temperature (25±10) °С, rpm — 4100±200
- Consumed current at the specified load and speed, A, no more than — 14
Possible malfunctions of the heater fan motor, their causes and remedies are given in Table. 26.