Washer Pump/Motor: Description

Fig 1: Washer Pump/Motor

Courtesy of DAIMLERCHRYSLER CORP.

The washer pump/motor unit is located on the top of a sump area of the washer reservoir, on the outboard side of the right front frame rail ahead of 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 valve body 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. See Fig 1.

An inlet nipple on the bottom of the pump housing passes through a rubber grommet seal/filter screen unit installed in a dedicated mounting hole of the washer reservoir. When the pump is installed in the reservoir the blue barbed outlet nipple on the pump valve body housing connects the unit to the front washer hose and the black barbed outlet nipple connects the unit to the rear washer hose. The number "2" molded into the front pump outlet nipple and the number "1" molded into the rear pump outlet 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/filter screen, 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 fit into a 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.