Audi 80/Avant (B4)

Audi 80/Avant
The description
System of release of the fulfilled gases
Cooling system
Fuel tank and the fuel pump
The air filter and intake channels
Injection system
Transmission and transmission
Suspension bracket and steering
Brake system
Antiblocking system of brakes
Wheels and tyres
body electrosystem
Ignition system
Signalling devices
- Devices and auxiliary devices
   Check of indicators and signalling devices
   Elements of a combination of devices
   The indicator of quantity of fuel
   The indicator of temperature of a cooling liquid
   Voltage stabilizer
   Additional devices
   The top indicators in a combination of devices
   The indicator of a cooling liquid
   The indicator of brake system
   The indicator of pressure of oil
   Indicators of indexes of turns
   The bottom indicators
   The indicator of a charge of the storage battery
   The indicator of indexes of turn of the trailer
   The indicator of a pillow of safety
   The indicator of antiblocking system
   The headlight indicator
   The indicator of a lay brake
   Self-examination system
   The ignition lock
   Check of switches
   Buzzer of switching-off of illumination and radio
   Heating of back glass
   Check of screen wipers and стеклоомывателей
   The screen wiper engine
   The list of malfunctions
   Screen wiper of back glass
   The list of malfunctions
   Replenishment of a tank of a washer of glasses
   System of washing of headlights
   The aerial of back glass
   Electric regulation of external rear-view mirrors
   System of locks with the central management
   Electric glass lifts
Heating and ventilation
Body elements
Search of malfunctions

Heating of back glass

Heating of back glass joins and switched off directly by the switch located on the instrument panel. A food to the switch arrives at the included ignition from the unloading relay of H-contact through a safety lock on a white-yellow wire. Therefrom at corresponding position of the switch a food goes to back glass through numerous plug connections in a white wire.

Search of malfunctions

If warmed back glass remains cold following malfunctions can be the reason of it:


  1. Faulty safety lock.
  2. The faulty switch. It should be removed (the way described in this chapter) and to check up by means of a control lamp, whether passes on a white wire a current at the included ignition and the pressed switch.
  3. To remove both coverings of racks near to back glass.
  4. To check up conducting to back glass: to check up by means of a control bulb, whether a food on a white connecting wire to glass at the left reaches back. (In the same way it is necessary to operate and on the models equipped with the aerial of back glass).
  5. To check up on the right rack, whether contact on "weight" of a thread of heating of glass is perfectly in order.
  6. If heating threads are damaged and by that the electric chain it is possible to use a silver current-carrying varnish is broken off. It is made, for example, by firm Doduco, and to get it it is possible in shop of autospare parts.