Cherokee 4WD L6-4.0L VIN S (1998)
Windshield Washer Pump: Description and Operation
SYSTEM OPERATION
The washer pumps and motors are mounted near the bottom of the washer reservoir. A barbed nipple on the pump housing passes through a rubber
grommet seal installed in a hole near the bottom of the reservoir. The washer pump is retained by an interference fit between the barbed pump
nipple and the grommet seal, which is a light press fit.
A permanently lubricated and sealed motor is coupled to a rotor-type pump. Washer fluid is gravity-fed from the reservoir to the pump. When the
motor is energized, the pump pressurizes the washer fluid and forces it through the plumbing to the nozzles.
On vehicles with the optional rear wiper/washer system, the front washer pump and motor is always mounted in the lower hole of the reservoir.
The washer pump and motor unit cannot be repaired. If faulty, the entire washer pump and motor unit must be replaced.