Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
- Electrotechnical equipment
   The minus is connected to weight
   The help for orientation in the electrotechnical equipment of the car
   Wires
   Connections of wires
   Central switching knot
   Support of additional relays
   Box for electronics
   Relay and control units
   Switching relay
   H-contact of the relay of unloading
   Table of the relay and control units
   Safety locks
   Table of safety locks
   + Electric circuits
   + Accumulator
   - Generator
      Generator of an alternating current
      Control bulb of a charging
      Tension regulator
      The self-help in work with the generator and a tension regulator
      Movement with the defective generator
      Maple and poliklinovy belt
      Check of a condition of a maple and poliklinovy belt
      Replacement of a maple and poliklinovy belt
      Torn maple a belt
      Review: maple and poliklinovy belt
      The help at malfunctions
   + Starter
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics










Control bulb of a charging

  • At a control bulb in the combined device two plusovy connections: first, on the plug D + the generator (a dark blue wire) and, secondly, on the plug 15 via the green mnogoshtyrkovy socket behind on the device (a black/red wire), going from the ignition lock.
  • At ignition inclusion on the plug 15 tension moves. But the generator yet does not work, therefore the disconnected contact of D + operates as "minus". The control bulb since between tension of the onboard network receiving a food from the accumulator, and distinction exists tension still not working generator lights up.
  • When the engine is started and the generator reaches number of turns of a charging then a regulator of tension connects the generator to the onboard electrotechnical equipment. Now plusovy the current arrives from the plug 15 and in addition from the plug D +. Thanks to it already there is no distinction in tension, the control bulb of a charging dies away.
  • The control bulb is not so necessary for so-called «preliminary excitement» generator of an alternating current, in Audi A4 it occurs already during engine start via the plug of the lock of ignition 50а.

Not always there is a charging

That the accumulator is charged from the generator, the gone-out control bulb does not prove. It says only that there is no more distinction in tension between the accumulator and the generator. If, for example, at operation of the engine on single turns all consumers of a current are included, the control bulb does not light up, though more current of the accumulator is consumed, than can give less powerful generators: nevertheless there is no distinction in tension in comparison with the accumulator.