Rear window wash/wipe operation is controlled by a switch in stalk unit H05 and the ignition-operated power supply from ignition switch H01 (INT/A).The power supply to stalk unit H05 reaches pin 2 of connector C via the output at pin 17 of connector G of under-dashboard junction unit B02. Inside control unit B02, this line leads from relay R12 through a line protected by fuse F52. The power supply to the relay is received from the line protected by fuse F1 in junction unit B01 from pin A connector C of under-dashboard control unit B02.The operation of relay R12 is determined by an ignition-operated supply line (INT/A) entering under-dashboard junction unit B02 at pin 1 connector E.Steering wheel stalk unit H05 controls rear wiper N16 via two lines (pins 4 and 3 of connector C) passing from under facia junction unit B02 (input: pin 15 and 11 connector G, output: pins 9 and 20 connector D).Stalk unit H05 also controls the windscreen/rear screen washer pump N22 via pins 12 and 10 connector A of the stalk unit, sending a supply signal and earth signal from pins 12 and 10 connector A.Stalk unit H05 is earthed at pin 7 connector A and pin 5 connector C.