Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 256

The two washer nozzles have integral mounts with

snap features that secure them near the tops of the
two wiper arms on the windshield. The lower surface
of the washer nozzle has an integral barbed nipple
that connects to the washer hose, and three nozzle
orifices are oriented to dispense the washer fluid on
the windshield glass throughout the wiped area of
the glass (Fig. 15). The washer nozzles are con-
structed entirely of molded plastic. The washer noz-
zles cannot be adjusted or repaired and, if faulty or
damaged, they must be replaced.

OPERATION

The two washer nozzles are designed to dispense

washer fluid into the wiper pattern area on the out-
side of the windshield glass. Pressurized washer fluid
is fed to each nozzle from the washer reservoir by the
washer pump/motor through rubber hoses, which are
attached to a barbed nipple on the underside of each
washer nozzle below the wiper arm. The three ori-
fices of each nozzle causes the pressurized washer
fluid to be emitted generously in several streams
throughout the travel of the wiper arm to more effec-
tively cover a larger area of the glass to be cleaned.

REMOVAL

(1) Using hand pressure, unsnap the washer noz-

zle from the wiper arm (Fig. 16).

(2) Disconnect the hose from the barbed nipple of

the washer nozzle.

INSTALLATION

(1) Reconnect the hose to the barbed nipple of the

washer nozzle (Fig. 16).

(2) Using hand pressure, slide the washer nozzle

onto the wiper arm until it snaps into place. Be cer-

tain the nozzle snap feature is engaged in the locator
hole on the wiper arm.

WASHER PUMP / MOTOR

DESCRIPTION

The washer pump/motor unit is located in a dedi-

cated hole on the top of the sump area near the back
of the windshield washer reservoir on the right front
fender wheel house in the engine compartment (Fig.
17). A small permanently lubricated and sealed elec-
tric motor is coupled to the rotor-type washer pump.
An inlet nipple on the bottom of the pump housing
passes through a rubber grommet seal installed in
the dedicated mounting hole in the washer reservoir.
A small barbed outlet nipple near the bottom of the
pump housing connects the unit to the washer hose.
The washer pump/motor unit is retained on the res-
ervoir by the interference fit between the inlet nipple
and the grommet seal, which is a light press fit. An
integral electrical connector receptacle is located on
the top of the motor housing.

An optional version of the washer pump/motor unit

incorporates an integral washer fluid level switch.
This version can be distinguished from models with-
out the switch by a vent nipple at the top of the
switch housing that is connected to a vent hose that
is retained in an integral clip behind the filler cap
near the top of the reservoir, and by a third terminal
pin in the washer pump/motor connector receptacle.
The washer pump/motor unit cannot be repaired. If
faulty or damaged, the entire washer pump/motor
unit must be replaced.

Fig. 16 Washer Nozzle Remove/Install

1 - WIPER ARM
2 - WASHER NOZZLE
3 - HOSE GUARD
4 - WASHER HOSE
5 - WIPER BLADE

Fig. 17 Washer Pump/Motor

1 - INLET NIPPLE
2 - WASHER PUMP/MOTOR
3 - CONNECTOR RECEPTACLE
4 - VENT NIPPLE (W/FLUID LEVEL SWITCH ONLY)
5 - WASHER FLUID LEVEL SWITCH HOUSING
6 - OUTLET NIPPLE

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WIPERS/WASHERS

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OPERATION

The washer pump/motor unit is connected to the

vehicle electrical system through a single take out
and connector of the vehicle wire harness. The
washer pump/motor is grounded at all times through
a take out of the vehicle wire harness with a single
eyelet terminal connector that is secured under a
ground screw located near the right headlamp in the
engine

compartment.

The

washer

pump/motor

receives battery current on a washer switch sense
circuit through the closed contacts of the momentary
washer switch circuitry within the multi-function
switch. When the pump motor is energized, the rotor-
type pump pressurizes the washer fluid and forces it
through the pump outlet nipple, the washer plumb-
ing, and the washer nozzles onto the windshield
glass. The washer pump/motor unit can be diagnosed
using conventional diagnostic tools and methods.

REMOVAL

(1) Disconnect the vehicle wire harness connector

for the washer pump/motor from the motor connector
receptacle (Fig. 18).

(2) Disconnect the washer supply hose from the

barbed outlet nipple of the washer pump/motor and
allow the washer fluid to drain into a clean container
for reuse.

(3) If the vehicle is so equipped, disconnect the

washer fluid level switch vent hose from the barbed
vent nipple near the top of the washer pump/motor
unit.

(4) Using hand pressure, firmly grasp and pull the

washer pump out of the rubber grommet seal in the
reservoir. Care must be taken not to damage the res-
ervoir.

(5) Remove the rubber grommet seal from the

washer pump mounting hole in the washer reservoir
and discard.

INSTALLATION

(1) Install a new rubber grommet seal into the

washer pump mounting hole in the washer reservoir.
Always use a new rubber grommet seal on the reser-
voir.

(2) Position the inlet nipple of the washer pump to

the rubber grommet seal in the reservoir.

(3) Using hand pressure, press firmly and evenly

on the washer pump until the inlet nipple is fully
seated in the rubber grommet seal in the washer res-
ervoir mounting hole (Fig. 18).

(4) If the vehicle is so equipped, reconnect the

washer fluid level switch vent hose to the barbed
vent nipple at the top of the washer pump/motor
housing.

(5) Reconnect the washer hose to the barbed outlet

nipple of the washer pump.

(6) Reconnect the vehicle wire harness connector

for the washer pump/motor unit to the motor connec-
tor receptacle.

(7) Refill the washer reservoir with the washer

fluid drained from the reservoir during the removal
procedure.

Fig. 18 Washer Pump/Motor Remove/Install

1 - WASHER RESERVOIR
2 - WASHER SUPPLY HOSE
3 - VENT HOSE (W/FLUID LEVEL SWITCH ONLY)
4 - WIRE HARNESS CONNECTOR
5 - WASHER PUMP/MOTOR

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WIPERS/WASHERS

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WASHER RESERVOIR

DESCRIPTION

The molded plastic washer fluid reservoir is

located in the right rear corner of the engine com-
partment (Fig. 19). Two integral mounting posts, one
on the bottom and one at the rear of the reservoir,
each are engaged in rubber mounting grommets, one
in the dash panel and one in the top of the right
front wheel house. A single nut and washer secures
an integral mounting hole near the top of the reser-
voir to a stud nut on the right inner fender shield.
Also near the upper inboard side of the reservoir are
two integral hose routing troughs, one for the stan-
dard washer supply hose and the second for the
optional vent hose used when the washer pump/mo-
tor is equipped with an integral washer fluid level
switch.

A molded blue plastic filler cap with an integral

retainer ring and tether strap snaps over the open
end of the filler neck, and hangs from the tether
when it is removed for inspecting or adjusting the
fluid level in the reservoir. There is a sump area near
the bottom inboard side of the reservoir with a dedi-
cated hole provided for the mounting of the washer/
pump motor unit and rubber grommet seal.

The washer reservoir cannot be repaired and, if

faulty or damaged, it must be replaced. The washer
reservoir, the mounting grommets, the grommet seal
for the washer pump/motor unit, and the filler cap
are each available for service replacement.

OPERATION

The washer fluid reservoir provides a secure,

on-vehicle storage location for a large reserve of

washer fluid for operation of the washer system. The
washer

reservoir

filler

neck

provides

a

clearly

marked and readily accessible point from which to
add washer fluid to the reservoir. The washer/pump
motor unit is located in a sump area near the bottom
of the reservoir to be certain that washer fluid will
be available to the pump as the fluid level in the res-
ervoir becomes depleted. The optional washer fluid
level switch is designed to provide adequate warning
to the vehicle operator that the washer fluid level is
low, before the washer system will no longer operate.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the upper turbocharger heat shield

and the upper air cleaner housing from the engine
compartment (Fig. 20).

(3) Disconnect the vehicle wire harness connector

for the washer pump/motor unit from the motor con-
nector receptacle.

(4) Disengage the vehicle wire harness from the

routing clip integral to the front of the washer reser-
voir (Fig. 21).

Fig. 19 Washer Reservoir

1 - CAP
2 - TROUGH (2)
3 - MOUNTING POST (2)
4 - WASHER PUMP/MOTOR
5 - RESERVOIR
6 - MOUNTING HOLE

Fig. 20 Heat Shield & Air Cleaner Housing

1 - UPPER AIR CLEANER HOUSING
2 - VEHICLE WIRE HARNESS CONNECTOR
3 - CLAMP
4 - UPPER TURBO HEAT SHIELD
5 - SCREW
6 - NUT (2)

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(5) Remove the washer supply hose from the

barbed outlet nipple of the washer pump/motor and
allow the washer fluid to drain into a clean container
for reuse.

(6) Disengage the washer supply hose from the

routing trough integral to the top of the washer res-
ervoir.

(7) Remove the nut and washer that secures the

top of the washer reservoir to the stud nut on the
right inner fender.

(8) Pull the washer reservoir inboard far enough to

disengage the reservoir from the stud nut.

(9) Tilt the washer reservoir forward far enough to

disengage the rear mounting post from the grommet
in the dash panel.

(10) Lift the washer reservoir upward far enough

to disengage the lower mounting post from the grom-
met in the top of the right front wheel house.

(11) Remove the washer reservoir from the engine

compartment.

INSTALLATION

(1) Position the washer reservoir into the engine

compartment.

(2) Engage the lower mounting post of the washer

reservoir into the grommet in the top of the right
front wheel house (Fig. 22).

(3) Engage the rear mounting post of the washer

reservoir into the grommet in the dash panel.

(4) Position the washer reservoir mounting hole

over the stud nut on the right inner fender (Fig. 21).

(5) Install and tighten the nut and washer that

secures the top of the washer reservoir to the stud
nut on the right inner fender. Tighten the nut to 6
N·m (50 in. lbs.).

(6) Reconnect the washer supply hose to the

barbed outlet nipple of the washer pump/motor.

(7) Engage the washer supply hose into the rout-

ing trough integral to the top of the washer reservoir.

(8) Reconnect the vehicle wire harness connector

for the washer pump/motor unit to the motor connec-
tor receptacle.

(9) Engage the vehicle wire harness into the rout-

ing clip integral to the front of the washer reservoir.

(10) Reinstall the upper turbocharger heat shield

and the upper air cleaner housing into the engine
compartment (Fig. 20).

(11) Refill the washer reservoir with the washer

fluid drained from the reservoir during the removal
procedure.

(12) Reconnect the battery negative cable.

Fig. 21 Washer Reservoir Remove/Install

1 - RIGHT INNER FENDER
2 - WASHER RESERVOIR
3 - NUT & WASHER
4 - ROUTING CLIP

Fig. 22 Washer Reservoir Mounting

1 - RIGHT INNER FENDER
2 - STUD NUT
3 - DASH PANEL
4 - RIGHT FRONT WHEEL HOUSE
5 - GROMMET (2)
6 - HOOD PROP

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WIPERS/WASHERS

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