Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car



Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
- 14. Electric equipment
   14.1.2. Measuring devices
   14.1.3. Technology of measurements
   14.1.4. Checks of electric equipment
   14.1.5. Sound signal
   14.1.6. Replacements of safety locks
   + 14.1.7. Rechargeable battery
   + 14.1.8. Generator
   + 14.1.9. Starter
   14.1.10. Traction relay
   + 14.1.11. System of lighting
   14.1.12. Devices
   14.1.13. Dashboard
   14.1.14. Glow lamps on the dashboard
   14.1.15. Light switch
   14.1.16. Radio receiver
   + 14.1.17. Antenna
   14.1.18. Loudspeakers
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Windscreen washer jets
   14.1.21. The washing nozzles of headlights
   14.1.22. Screen wiper and its engine
   14.1.23. Protect the car
   14.1.24. Anticreeping "immunodeficiency"
   14.1.25. Why headlights grow dull
   14.1.26. Galogenka
+ 14.2. Electrical circuitries






14. Electric equipment

14.1. System of electric equipment

14.1.1. Introduction

GENERAL INFORMATION

When checking electric equipment in technical documentation the owner of the car faces the concepts "tension, current and resistance".

Tension is measured in Volts (V), current – in Amperes (A) and resistance – in Ohms (R). In the car tension, as a rule, is meant a concept tension of the rechargeable battery. At the same time about 12 V. Velichina of tension of the rechargeable battery depending on degree of its razryazhennost are about tension of a direct current and from temperature of external air can make 10–13 Century. On the other hand, tension developed by the generator for onboard network with an average frequency of rotation of a shaft of the engine makes about 14 Century.

The concept "current" rather seldom meets in the field of power supply of the car. Current is specified, for example, on a reverse side of safety locks and specifies the maximum current which can proceed without burn-out of safety locks and, therefore, without rupture of an electric chain. Everywhere, where current proceeds, it has to be shunted by resistance. Resistance, among other things, depends on the following factors: cross section of a wire, material of a wire, consumption of current, etc. If resistance too big, then there are functional violations. For example, resistance of wires of high voltage should not be too high, otherwise force of sparks on spark plugs which ignite fuel-air mix sufficiently decreases and, therefore, start the engine.