Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

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
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
- Signaling devices
   Verification of indexes of turn and alarm light system
   Check of a stoplight
   Stoplight switch
   List of malfunctions
   Check of a sound signal
   Short-term signal driving beam
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications

Check of a sound signal

By pressing a horn the contact with "weight" (case) is provided by contacts in a steering wheel (3) and in a payment of a sound signal (1). Further the way passes through shtekerny connection (2).

On an illustration horns (1 and 2) at the removed bumper are visible.

Continuous check

By pressing the horn located in a steering wheel at the included ignition the usual or two-tone sound signal has to work. The button of a sound signal closes on "weight" (case) an electric chain of the relay of a sound signal (the head Pribory and auxiliary devices). Giving of food to the relay goes from the plug X receiving tension only at the included ignition.

At the closed electric chain (that is at the pressed horn) contacts of the relay become isolated, and to a sound signal food on a wire with a black-yellow cover arrives. Conducting to "weight" for a sound signal goes on a brown wire.

Faulty sound signal?


  1. To remove the lower protection of a motor compartment (the head Elementy of a body).
  2. To disconnect tips of wires.
  3. To remove the corresponding horn.
  4. To connect to each shtekerny socket on an auxiliary wire and to connect it to positive and negative plugs of the accumulator.
  5. If nothing is heard, so this horn is faulty.
  6. The rattling or absolutely "mute" horn sometimes can be adjusted or returned to life rotation of the adjusting screw located on its reverse side.
  7. To clear the screw of filling mastic.
  8. After adjustment to seal the screw with sealant for a body again.
  9. The same method of check should be applied also at a two-tone sound signal.