Inspection

Connector M0-01:

Remove the multifunction switch and disconnect the wire connectors.
Check the switch for continuity between the terminals. If continuity is not as specified, replace the wiper and washer switch.

Wiper And Intermittent Volume Switch [M20-1]:

WIPER AND INTERMITTENT VOLUME SWITCH [MO1-1]

Washer Switch [M20-1]:

WASHER SWITCH [MO1-1]