Wash Mode

When the control stalk of the right (wiper) multi-function switch is pulled rearward to the momentary front WASH position, the switch provides a resistor multiplexed input to the BCM. The BCM responds by providing battery current and ground to the washer pump/motor. This will cause the washer pump/motor to be energized in the front wash direction for as long as the switch is held closed and to be de-energized when the control stalk is released.

When the control stalk is pulled rearward to the momentary front WASH position while the front wiper system is operating in the DELAY mode, the washer pump/motor operation is the same. However, the BCM also overrides the DELAY mode and operates the front wiper motor in a continuous low speed mode for as long as the control stalk is held in the WASH position, then reverts to the DELAY mode several wipe cycles after the control stalk is released.