Dodge Nitro. Manual — part 973

Courtesy of CHRYSLER LLC

1. Position the front washer nozzle (2) to the mounting hole on the outside of the hood panel (1).

2. Align the anti-rotation tab of the nozzle with the anti-rotation notch in the mounting hole.

3. Using hand pressure, push firmly and evenly on the top of the nozzle until the integral latches lock into

place on the underside of the hood.

4. From the underside of the hood, reconnect the washer hose to the barbed nipple of the nozzle.

5. Reinstall the push-in retainers that secure the hood silencer pad to the inner hood reinforcement.

WASHER PUMP/MOTOR

DESCRIPTION

WASHER PUMP/MOTOR

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Wipers/Washers - Service Information - Nitro

Fig. 24: Washer Pump/Motor
Courtesy of CHRYSLER LLC

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.

OPERATION

WASHER PUMP/MOTOR

Fig. 25: Identifying Pump/Motor Operation
Courtesy of CHRYSLER LLC

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

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Wipers/Washers - Service Information - Nitro

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. Washer fluid is drawn through the
pump inlet nipple from the washer reservoir to the inlet port of the washer pump housing. An integral valve
body is located in a housing on the outlet port side (2) of the pump housing. A diaphragm (4) in this valve body
controls which washer system plumbing receives the washer fluid being pressurized by the pump. When the
pump is not operating the diaphragm is biased to close all washer fluid flow in the rear washer system and, in
this way it also performs the function of the rear washer system check valve.

When the pump impeller (1) rotates in the counterclockwise direction (viewed from the bottom), the biased
diaphragm is sealing off the rear washer system outlet and nipple so the pressurized washer fluid is pushed out
through the pump front outlet port and the front washer outlet nipple (5). When the pump impeller rotates in the
clockwise direction (viewed from the bottom), pressurized washer fluid is pushed out through the pump rear
outlet port and moves the diaphragm to open the rear washer outlet nipple and seal off the front washer outlet
nipple, then the pressurized washer fluid is pushed out through the rear washer outlet nipple (3).

The washer pump/motor unit and the hard wired circuits between the motor and the multi-function switch may
be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information.

REMOVAL

WASHER PUMP/MOTOR

Fig. 26: Identifying Washer Reservoir, Motor Housing, Front End Module Wire Harness Connector &
Washer Hoses
Courtesy of CHRYSLER LLC

1. Disconnect and isolate the battery negative cable.

NOTE:

The washer pump/motor can be removed from the washer reservoir without
removing the reservoir from the vehicle.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Wipers/Washers - Service Information - Nitro

2. Siphon the washer fluid from the washer reservoir (1) on the left side of the cooling module in the engine

compartment into a clean container for reuse.

3. Disconnect the front end module wire harness connector (3) from the washer pump/motor unit connector

receptacle on the top of the motor housing (2).

4. Disconnect the two washer hoses (4 and 5) from the two washer pump/motor unit outlet nipples.

5. Firmly grasp the top of the washer pump/motor housing and pull it lightly outward from the washer

reservoir far enough to disengage the top of the motor from the receptacle in the reservoir. Care must be
taken not to damage the reservoir.

6. Pull the washer pump/motor unit straight up and out of the washer reservoir far enough to disengage the

inlet nipple from the rubber grommet seal/filter screen in the reservoir.

7. Remove the rubber grommet seal/filter screen for the washer pump from the pump mounting hole in the

washer reservoir and discard.

INSTALLATION

WASHER PUMP/MOTOR

Fig. 27: Identifying Washer Reservoir, Motor Housing, Front End Module Wire Harness Connector &
Washer Hoses
Courtesy of CHRYSLER LLC

1. Install a new rubber grommet seal/filter screen unit into the washer pump mounting hole in the washer

reservoir (1). Always use a new rubber grommet seal/filter screen on the reservoir.

2. Position the inlet nipple of the washer pump (2) to the rubber grommet seal/filter screen in the washer

reservoir.

3. Using hand pressure, press firmly and evenly downward on the washer pump/motor unit until the inlet

nipple is fully seated in the rubber grommet seal/filter screen in the pump mounting hole of the reservoir.

4. Align the top of the washer pump/motor housing with the receptacle in the washer reservoir.

5. Using hand pressure, press firmly and evenly on the top of washer pump/motor unit until the motor

housing snaps into the reservoir receptacle.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Wipers/Washers - Service Information - Nitro