3315596 - 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. Steering column switch unit H5 is supplied at pin 3 of connector D via pins 1 and 3 of connector B for the windscreen wiper motor N15 by the ignition-controlled line (15/54) of relay T1 of B2 protected by fuse F14. 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 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 the intermittent/automatic operation: the signal reaches pin 2 of connector A of motor N15 and the rain sensor K85 pin 5; this signal differs according to adjustment ring position, which adds no resistance, one resistance or two resistances to the line to obtain the different intermittent speeds.