Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
- Devices and auxiliary devices
   Check of indicators and signaling devices
   Elements of a combination of devices
   Indicator of amount of fuel
   The indicator of temperature of cooling liquid
   Voltage stabilizer
   Additional devices
   The top indicators in a combination of devices
   The indicator of cooling liquid
   Indicator of brake system
   Indicator of pressure of oil
   Indicators of indexes of turns
   Bottom indicators
   Indicator of a charge of the storage battery
   Indicator of indexes of turn of the trailer
   Safety cushion indicator
   Indicator of anti-blocking system
   Indicator of a driving beam
   Indicator of the parking brake
   Self-examination system
   Ignition lock
   Check of switches
   Buzzer of shutdown of lighting and radio
   Heating of back glass
   Check of screen wipers and stekloomyvatel
   Screen wiper engine
   List of malfunctions
   Screen wiper of back glass
   List of malfunctions
   Replenishment of a tank of a washer of glasses
   System of washing of headlights
   Aerial of back glass
   Electric regulation of external rear-view mirrors
   System of locks with the central management
   Electric window regulators
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Aerial of back glass

At such type of aerials as the aerial on reception of SV two metal conductors in the top of glass act. For reception of VHF (FM) other conductors which are acting at the same time as wire heating элеметов serve. The antenna amplifier located under a covering of the left back rack, compensates insufficient height of this antenna system.

Behind the left covering of a back rack disappear:

1–aerial connection on reception of VHF (FM);
2–the general connection of heating of back glass and the aerial on SV reception;

3–amplifier of the aerial.

The point of "weight" (shooter) for heating of back glass and the aerial of back glass is on the right back rack. On an illustration the rack is shown with the removed covering.

Search of malfunctions of the aerial of back glass


  1. To remove coverings of both back racks.
  2. To check connection on "mass" of heating of back glass at the right rack; further to check connection on "mass" (case) of the antenna amplifier on his fixing bolt.
  3. Attentively to check conductors on back glass: whether it is possible to find visible interruption? If yes, that to repair by means of a current-carrying silver varnish or to replace this glass with the new.
  4. Now it is necessary to be engaged in electric check: to separate tips of the amplifier, to measure tension on on "weight". For this purpose to include radio.
  5. Tension existence: supply by a food of the amplifier as it should be. Tension is absent: to eliminate a rupture of a chain.
  6. In the same wire to measure a current between connection of the amplifier and the removed wire.
  7. The ampermeter should show 30 — 50 мА, otherwise the antenna amplifier does not receive a food and is respectively faulty – to replace.
  8. Further: to disconnect the bottom wire of heating of back glass, to include ignition and heating of back glass, to measure tension in a wire.
  9. The wire should be energized the storage battery, wires or the amplifier otherwise are faulty. To narrow a troubleshooting circle.
  10. To disconnect the bottom wire from the amplifier, to measure tension at the included ignition and heating of back glass:
  11. If the device shows tension of the storage battery, means, wires as it should be, that is the amplifier is faulty. Otherwise all on the contrary.