Mercedes S-Class W-140

1991-1999 of release

Repair and car operation



Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Specifications
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Check of the electric motor of a screen wiper
   Check of warmed back glass
   Replacement of filament lamps
   Electric safety locks
   Installation of electric and electronic devices
   Arrangement of the basic electric elements of system of electric equipment of a body of the car
   + Schematic diagrams of electric equipment



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Check of the electric motor of a screen wiper

The electric motor of a screen wiper is in a water modular compartment under a windscreen. For check it is necessary to remove the corresponding cover.

Designation of plugs

On the electric motor there are following plugs:
  • The plug 31 is weight accession (the general for all electric equipment of the car).
  • The plug 53 receives tension for the first speed of a screen wiper.
  • The plug 53а feeds with a current (+) the extreme provision of a screen wiper. The electric motor receives tension through a brush until the cleaner will not return to a starting position when the driver will switch off a screen wiper.
  • The plug 53b submits tension for the second speed of a screen wiper (an auxiliary winding).
  • Via the plug 53е the electric motor is braked at return after shutdown that the screen wiper did not pass through the provision of a parking.
  • Are available not always in stock: the plug 53 with submits a food to the pump of a stekloomyvatel.
  • Electric motor check

    At first it is necessary to find out that has defect, the electric motor or there is no food. Thus it is necessary to operate as follows:
    1. Rasstykuyte the multicontact socket at the electric motor.
    2. Bring 2 auxiliary cables (+) and (-) from the storage battery of the car to the screen wiper electric motor:
    3. One cable carry out from the positive plug of the battery to the plug 53 or 53b.
    4. The second cable bring from the negative plug of the storage battery to the plug of 31 electric motors.
    1. Now the electric motor should to turn on depending on the used plug on I or the II step. If it does not occur, the electric motor or the corresponding step have defect. Remove the electric motor.