Liberty Sport 2WD L4-2.4L VIN 1 (2002)
Windshield Washer Motor: Description and Operation
Fig.18 Washer Pump/Install
WASHER PUMP/MOTOR
The washer pump/motor unit is located on the outboard side of the washer reservoir on the outboard side of the right front frame rail behind the
right front wheel house splash shield. A small permanently lubricated and sealed reversible electric motor is coupled to the rotor-type washer
pump. The use of an integral shuttle valve allows the washer pump/ motor unit to provide washer fluid to either the front or the rear washer
systems, depending upon the direction of the motor/pump impeller rotation. A seal flange with a barbed inlet nipple on the pump housing passes
through a rubber grommet seal installed in a dedicated mounting hole of the washer reservoir. When the pump is installed in the reservoir the front
barbed outlet nipple on the pump shuttle valve housing connects the unit to the front washer hose and the rear barbed outlet nipple connects the
unit to the rear washer hose. The letters "F" and "R" molded into the shuttle valve housing adjacent to each nipple provide further clarification of
the nipple assignments.
The washer pump/motor unit is retained on the reservoir by the interference fit between the barbed pump inlet nipple and the grommet seal, which
is a light press fit. The top of the washer pump is also secured to the washer reservoir by the use of a snap post on the motor and a snap post
receptacle molded into the reservoir that allows for mounting of the washer pump without the use of fasteners. An integral connector receptacle on
the top of the motor housing connects the unit to the vehicle electrical system through a dedicated take out and connector of the headlamp and dash
wire harness. The washer pump/motor unit cannot be repaired. If faulty or damaged, the entire washer pump/motor unit must be replaced.
The washer pump/motor unit features a reversible electric motor. The direction of the motor is controlled by hard wired outputs from the
momentary front and rear washer switch circuitry contained within the right (wiper) control stalk of the multi- function switch. When battery
current and ground are applied to the two pump motor terminals, the motor rotates in one direction. When the polarity of these connections is
reversed, the motor rotates in the opposite direction. When the pump motor is energized, the rotor-type pump pressurizes the washer fluid and
forces it through one of the two pump outlet nipples, and into the front or rear washer plumbing.
