The Rear Screen Wash Pump (M119) motor is
grounded at all times. The motor runs when battery
voltage is applied to the motor through the Rear
Screen Wash Switch (X222) when the switch is
switched to the WASH position.
When the Rear Wiper Switch (X221) is pulled to the
WIPE position, the Multifunction Unit (MFU) (Z148)
applies ground to the Rear Wipe Relay (K183).
Battery voltage is then applied to the Rear Wiper
Motor (M120) from Fuse F18.