223001840 - E3020 WINDSCREEN WASH/WIPE - FUNCTIONAL DESCRIPTION

Functional description

The windscreen wiper switch on the steering column switch unit H05 makes it possible to select the different windscreen wash/wipe operating modes.The supply for the steering column switch unit H05 arrives at pin 11 of connector A via the outlet at pin 10 connector A of the junction unit under the dashboard B02 .Inside the junction unit B02 this line comes from the relay R12 via a line protected by fuse F43 . The supply at the relay arrives from the line protected by fuse F1 housed in the junction unit B01 from pin A connector C of the junction unit under the dashboard B02 .The operation of the relay R12 is determined by the supply line controlled by the ignition (INT/A) entering the junction unit under the dashboard B02 at pin 1 connector E.

Depending on the pre-selected function, the stalk unit H05 (connector A) sends the following control signals to the internal electronic device to the windscreen wiper motor N15:

  • from pin 9 for operation at first speed;
  • from pin 8 for operation at second speed;
  • from pin 6 for zeroing.
Stalk unit H05 also supplies windscreen/rear window wiper pump N22 by sending a supply signal and an an earth signal from pins 12 and 10 of connector A. Steering column switch unit H05 is earthed at pin 7 connector A and at pin 5 connector C.The windscreen wiper motor N15 is then connected to earth at pin 5.