Slowing down wiper motor, function - GF82.30-P-4007S

Models 215, 220 

Following the completion of a wiping operation, the wipers must come to a stop in the park position.

Stopping wiper motor 

To stop the motor, the wiper On and Off relay (K40/6kH) is switched off by the left front SAM control module (N10/6). Through the opening of this relay:

• The connection circuit 53 for the wiper motor (M6/1) is disconnected from the voltage supply circuit 15R
• The connection circuit 53 for the wiper motor (M6/1) is connected to ground via an electronic switch (FET) of the SAM; this short-circuits the motor
• This short circuit decelerates the motor (eddy current dynamometer)

Prerequisites for stopping wiper motor 

The stopping of the wiper motor (M6/1) is only initiated if:

• The wiper motor is switched off (combination switch (S4) in position 0) or
• Intermittent wiping is switched on (combination switch (S4) in position 1) and an intermittent pause has just started
• The cam switch is closed, and thus the park position has been reached

In order to detect the park position, the wiper motor (M6/1) has a cam switch. When the motor runs through the park position, the cam switch is actuated.

The signal from the cam switch is interrogated continuously by the left front SAM control module (N10/6).