A single signal (earth) is sent from stalk unit H5 to Body Computer M1, which manages all the rearscreen wiper commands: from pin 4 of H5 to pin 29 of connector D of M1; the signal is coded via resistance dividers so that multiple information can be sent via a single connection from the stalk unit to the Body Computer. A reference earth reaches pin 10 of H5 from pin 34 of connector D of M1.Similarly, the windscreen washer commands are sent from pin 5 of H5 to pin 55 of connector D of M1.Body Computer M1 - connector G - is supplied directly from the battery from a line protected by maxifuse F2 of engine compartment control unit B1. It is supplied by an ignition-operated supply (INT) at pin 32 of connector D; pin 10 of connector H of M1 provides the Body Computer with a reference earth.Body Computer M1 sends a control signal to the rear wiper motor N16 from pin 15 of connector E:Pin 24 of connector A on the other hand, receives the earth signal coming from the motor end of travel cam which stops operation. The rearscreen wiper motor N16 is then earthed.Body Computer M1 sends two signals from pins 3 and 14 of connector E, which operates the pump of windscreen washer N22, which turns to send washer fluid forward to the windscreen wiper. The supply line from the pump is protected by fuse F42 located on Body Computer M1.