Nitro 2WD V6-4.0L (2007)
Windshield Washer Pump: Description and Operation
Description
DESCRIPTION
The washer pump/motor unit is located on the top of a sump area on the left outboard side of the washer reservoir, which is integral to the coolant
reserve bottle on the left side of the cooling module in the engine compartment. A small permanently lubricated and sealed reversible electric motor (3)
is coupled to the rotor-type washer pump (4). The use of an integral valve body (7) 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.
An inlet nipple (6) on the pump housing passes through a rubber grommet seal/filter screen installed in a dedicated mounting hole of the washer reservoir
sump. The filter screen prevents most debris from entering the pump housing. When the pump is installed in the reservoir the front barbed outlet nipple
(5) on the pump valve body housing connects the unit to the front washer hose, and the rear barbed outlet nipple (8) connects the unit to the rear washer
hose. The letters F and R molded into the valve body 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 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 fit between the motor housing and a receptacle molded
into the reservoir that allows for mounting of the washer pump without the use of fasteners. An integral connector receptacle (1) 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 ineffective or damaged, the entire washer pump/motor unit must be replaced.
