Mercedes S-Class W-140

In 1991-1999 editions

Repair and enterprise of the car


Mercedes S-Class
+ Mercedes Benz cars of the class S (W-140)
+ operation manual
+ Routine maintenance
+ motor
+ cooling systems, heating
+ systems of power supply and edition
+ electric equipment of the motor
+ gear shifting boxes
+ Awtomatitscheckaja transmission
+ connection
+ brake system
+ Aufhängung and management
+ Body
- Electric onboard equipment
   Specifications
   Diagnostics of defects of the electric onboard equipment - the general information
   Check of the electric motor of a screen wiper
   Check of heated back glass
   Compensation of glow lamps
   Electric protection devices
   Device of electric and electronic devices
   Arrangement of electric basic elements of system of the electric equipment of a car body
   + Schematic diagrams of the electric equipment


Check of the electric motor of a screen wiper

The electric motor of a screen wiper is in water division of a maw of the wet nurse under a windshield. For check it is necessary to accept the corresponding cover.

Name of clips

On the electric motor there are following clips:
  • The clip 31 is an introduction of weight (in general, for all electric equipment of the car).
  • The clip 53 receives effort for the first speed of a screen wiper.
  • The clip feeds 53a from current (+) the extreme provision of a screen wiper. The electric motor receives effort a brush until cleaner does not come back to a starting position if the driver excludes a screen wiper.
  • The clip 53b gives effort for the second speed of a screen wiper (auxiliary parcels).
  • The electric motor at return is stopped by a clip 53e after shutdown that the screen wiper thanks to position of the parking did not pass.
  • Not always are available: the clip 53 with gives food to the pump stekloomywatelja.

    • Check of the electric motor

    First, it is necessary to find out what has a defect, the electric motor or is absent food. At the same time it is necessary to be considered as the next way:
    1. Rasstykujte Mehrkontaktstecker at the electric motor.
    2. Bring 2 auxiliary cables (+) and (-) from the car battery to the screen wiper electric motor:
    3. You carry out a cable from a positive clip of the battery to a clip 53 or 53b.
    4. You bring the second cable from a negative clip of the battery to a clip 31 electric motors.
    1. Now the electric motor owes itself depending on the used clip on I or II steps to enlist. If it does not occur, the electric motor or the corresponding step have defect. Accept the electric motor.