3315593 - E3020 WINDSCREEN WASH/WIPE - Functional description
Functional description
The windscreen wiper control on the steering column switch unit H5 selects the various operating modes of the windscreen wash/wipe. The stalk unit H5 is supplied at pin 3 of connector D from the ignition-operated line (INT/A) of the relay R1 protected by the fuse F14 : both are contained in the junction unit B1 . The same line supplies the electronic device in the windscreen wiper motor N15 : - pin 3 of the connector B - and returns - from pin 1 of connector B - to the stalk unit H5 . The windscreen wiper motor N15 is then connected to earth - pin 1 of connector A.Depending on the pre-selected function, the stalk unit H5 (connector D) sends the following control signals to the internal electronic device to the windscreen wiper motor N15:
- from pin 3 of connector C for continuous fast operation: the signal reaches pin 5 of connector A of the motor N15 ;
- from pin 1 of connector D for continuous slow operation: the signal reaches pin 4 of connector A of motor N15 ;
- from pin 10 of connector D for intermittent/automatic operation: the signal reaches pin 2 of connector A of the motor N15 and the rain sensor K85 pin 5: this signal differs depending on the position of the intermittent function adjuster ring, which connects none, one or several resistors on the line, thus obtaining the different intermittent speeds.