The electronic device inside the steering column switch unit H5 and the controls on the right lever receive a power supply at pin 11 of connector A from the ignition-controlled line (INT/A) of relay T12 protected by fuse F43, both housed in the junction unit under the dashboard B2.Pin 7 of connector A and 9 of connector C of H5 are earthed.The electronic device inside the steering column switch unit H5, which controls the rear wiper receive a power supply at pin 12 of connector C from the ignition-controlled line (INT/A) of relay T12 protected by fuse F52, both housed in the junction unit under the dashboard B2.Steering wheel stalk unit H5 sends a command to rear wiper motor N16 from pin 1 of connector B while pin 2 receives an earth signal from the motor end stop cam, which stops operation.Pin 3 of connector A of H5 receives the reverse engaged signal for automatic rear wiper operation.The steering column switch unit H5 windscreen washer switch, once activated, sends two signals from pins 10 and 12 of connector A which operate the windscreen washer pump N22 which turns sending the washer fluid to the windscreen wiper.