Grand Cherokee 2WD V8-4.7L VIN J (2004)
for as long as the stalk is held in the momentary REAR WASH position.
If any part of the right multi-function switch stalk is faulty or damaged, the entire wiper multifunction switch assembly must be replaced.
REAR WIPER SYSTEM
Five circuits feed the rear wiper module. It has two high current circuits, battery (B+) and ground, that run the motor. The remaining three circuits are
low current control circuits.
Two of these circuits come from the rear wiper switch on the right multi-function switch stalk. These circuits are referred to as the rear wiper motor
control circuit and the rear wiper motor intermittent control circuit. When the rear wiper switch is in the Off position, both of these circuits are open
and the wiper module parks or remains parked. When the rear wiper switch is in the Intermittent position, the intermittent control circuit is switched to
ignition voltage, the motor control circuit is open and the wiper is in the intermittent modes. When the rear wiper switch is in the On position, the
intermittent control circuit is open and the motor control circuit is switched to ignition voltage and the wiper is in continuous wipe mode.
The third control circuit is the AJAR circuit. This circuit is fed by the flip-up glass ajar switch. When the flip-up glass is closed the ajar switch is open
and the rear wiper module functions normally. When the flip-up glass is open, the ajar switch is closed and the circuit provides ground to the module.
This ground signal indicates to the rear wiper module that it should park if operating or not allow operation if parked.
