DODGE RAM 2002 Service Repair Manual

REMOVAL
The washer fluid level switch can be removed from
the washer reservoir without removing the reservoir
from the vehicle.
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the washer hose from the barbed
outlet nipple of the washer pump/motor unit and
allow the washer fluid to drain into a clean container
for reuse.
(3) Disconnect the headlamp and dash wire har-
ness connector for the washer fluid level switch from
the switch connector receptacle (Fig. 2).
NOTE: The pivoting float of the washer fluid level
switch must be in a horizontal position within the
reservoir in order to be removed. With the reservoir
empty and in an upright position, the pivoting float
will orient itself to the horizontal position when the
switch connector receptacle is pointed straight
downwards.
(4) Using a trim stick or another suitable wide
flat-bladed tool, gently pry the barbed nipple of the
washer fluid level switch out of the rubber grommet
seal on the rear of the reservoir. Care must be taken
not to damage the reservoir.
(5) Remove the washer fluid level switch and float
from the washer reservoir.
(6) Remove the rubber grommet seal from the
washer fluid level switch mounting hole in the
washer reservoir and discard.
INSTALLATION
(1) Install a new rubber grommet seal into the
washer fluid level switch mounting hole in the front
of the washer reservoir. Always use a new rubber
grommet seal on the reservoir.
(2) Position the float of the washer fluid level
switch through the rubber grommet seal in the
washer reservoir (Fig. 2). The connector receptacle of
the washer fluid level switch should be pointed
downward.
(3) Press firmly and evenly on the washer fluid
level switch using hand pressure until the barbed
nipple is fully seated in the rubber grommet seal in
the washer reservoir mounting hole.
(4) Reconnect the headlamp and dash wire harness
connector for the washer fluid level switch to the
switch connector receptacle.
(5) Reconnect the washer hose to the barbed outlet
nipple of the washer pump/motor unit.
(6) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(7) Reconnect the battery negative cable.
WASHER HOSES/TUBES
DESCRIPTION
The washer plumbing consists of a small diameter
rubber hose that is routed from the barbed outlet
nipple of the washer pump/motor on the washer res-
ervoir through the engine compartment along the left
inner fender shield to a molded plastic in-line fitting
with barbed nipples near the dash panel. A second
section of washer hose passes from the engine com-
partment into the cowl plenum area through a dedi-
cated hole with a rubber grommet near the left end
of the cowl plenum panel. Beneath the cowl plenum
cover/grille panel, a molded plastic wye fitting with
barbed nipples joins the engine compartment hose to
the two washer nozzle hoses. The two washer hoses
are routed through locating clips on the underside of
the cowl plenum cover/grille panel to the two washer
nozzles.
Washer hose is available for service only as roll
stock, which must then be cut to length. The molded
plastic washer hose fittings cannot be repaired. If
these fittings are faulty or damaged, they must be
replaced.
OPERATION
Washer fluid in the washer reservoir is pressurized
and fed by the washer pump/motor through the
washer system plumbing and fittings to the two
washer nozzles. Whenever routing the washer hose
or a wire harness containing a washer hose, it must
Fig. 2 Washer Reservoir
1 - FAN SHROUD
2 - LOW WASHER FLUID SENSOR
3 - WASHER PUMP
4 - WASHER RESERVOIR
8R - 8 WIPERS/WASHERSBR/BE
WASHER FLUID LEVEL SWITCH (Continued)

be routed away from hot, sharp, or moving parts;
and, sharp bends that might pinch the hose must be
avoided.
WASHER NOZZLE
DESCRIPTION
The two washer nozzles have integral snap fea-
tures that secure them in dedicated holes in the cowl
plenum cover/grille panel located near the base of the
windshield. The domed upper surface of the washer
nozzle is visible on the top of the plenum cover/grille
panel, and the nozzle orifice is oriented towards the
windshield glass. The washer plumbing fittings for
the washer nozzles are concealed beneath the cowl
plenum cover/grille panel. These fluidic washer noz-
zles are constructed of molded plastic. The cowl ple-
num cover/grille panel must be removed from the
vehicle to access the nozzles for service. The washer
nozzles 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 each washer nozzle
below the cowl plenum cover/grille panel. The washer
nozzles incorporate a fluidic design, which causes the
nozzle to emit the pressurized washer fluid as an
oscillating stream to more effectively cover a larger
area of the glass area to be cleaned.
REMOVAL
(1) Remove the cowl plenum cover/grille panel
from the cowl top. (Refer to 23 - BODY/EXTERIOR/
COWL GRILLE - REMOVAL).
(2) From the underside of the cowl plenum cover/
grille panel, disconnect the washer hose from the
nozzle fitting.
(3) From the underside of the cowl plenum cover/
grille panel, compress the snap features of the
washer nozzle and push the nozzle out through the
top of the panel.
INSTALLATION
(1) From the top of the cowl plenum cover/grille
panel, insert the barbed nipple of the washer nozzle
through the nozzle mounting hole.
(2) With the orifice of the washer nozzle oriented
toward the windshield, use hand pressure to push
the nozzle into the mounting hole until the snap fea-tures of the nozzle are fully engaged with the under-
side of the cowl plenum cover/grille panel.
(3) From the underside of the cowl plenum cover/
grille panel, reconnect the washer hose to the washer
nozzle fitting.
(4) Reinstall the cowl plenum cover/grille panel
onto the cowl top. (Refer to 23 - BODY/EXTERIOR/
COWL GRILLE - INSTALLATION).
WASHER PUMP/MOTOR
DESCRIPTION
The washer pump/motor unit is located on the rear
of the washer reservoir, near the bottom in the left
front corner of the engine compartment. A small per-
manently lubricated and sealed electric motor is cou-
pled to the rotor-type washer pump. A seal flange
with a large barbed inlet nipple on the pump housing
passes through a rubber grommet seal installed in
the dedicated mounting hole near the bottom of the
washer reservoir. A smaller barbed outlet nipple on
the pump housing connects the unit to the washer
hose. 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. An integral electrical connector recep-
tacle is located on the motor housing. The washer
pump/motor unit cannot be repaired. If faulty or
damaged, the entire washer pump/motor unit must
be replaced.
OPERATION
The washer pump/motor unit is connected to the
vehicle electrical system through a single take out
and two-cavity connector of the headlamp and dash
wire harness. The washer pump/motor is grounded at
all times through a take out of the headlamp and
dash wire harness with a single eyelet terminal con-
nector that is secured by a nut to a ground stud
located on the forward extension of the left front
fender wheel housing in the engine compartment.
The washer pump/motor receives battery current on
a fused ignition switch output (run-acc) circuit
through the closed contacts of the momentary washer
switch within the multi-function switch only when
the washer button on the end of the switch control
stalk is depressed towards the steering column.
Washer fluid is gravity-fed from the washer reservoir
to the inlet side of the washer pump. When the pump
motor is energized, the rotor-type pump pressurizes
the washer fluid and forces it through the pump out-
let nipple, the washer plumbing, and the washer noz-
zles onto the windshield glass.
BR/BEWIPERS/WASHERS 8R - 9
WASHER HOSES/TUBES (Continued)

REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the headlamp and dash wire har-
ness connector for the washer pump/motor from the
motor connector receptacle (Fig. 3).
(3) Disconnect the washer hose from the barbed
outlet nipple of the washer pump/motor and allow
the washer fluid to drain into a clean container for
reuse.
(4) Using a trim stick or another suitable wide
flat-bladed tool, gently pry the barbed inlet nipple of
the washer pump out of the rubber grommet seal in
the reservoir. Care must be taken not to damage the
reservoir.
(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 barbed inlet nipple of the washer
pump to the rubber grommet seal in the reservoir.
(3) Press firmly and evenly on the washer pump
until the barbed inlet nipple is fully seated in the
rubber grommet seal in the washer reservoir mount-
ing hole.
(4) Reconnect the washer hose to the barbed outlet
nipple of the washer pump.(5) Reconnect the headlamp and dash wire harness
connector for the washer pump/motor unit to the
motor connector receptacle (Fig. 3).
(6) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(7) Reconnect the battery negative cable.
WASHER RESERVOIR
DESCRIPTION
The molded plastic washer fluid reservoir is
secured with integral mounting tabs to keyed slots
on the left side of the radiator fan shroud in the left
front corner of the engine compartment. A bright yel-
low plastic filler cap with a rubber seal and an Inter-
national Control and Display Symbol icon for
ªWindshield Washerº and the text ªWasher Fluid
Onlyº molded into it snaps over the open end of the
filler neck. A bail strap that is integral to the cap
secures the cap to the reservoir filler neck when it is
removed for inspecting or adjusting the fluid level in
the reservoir. There are separate, dedicated holes on
the rear side of the reservoir provided for the mount-
ing of the washer/pump motor unit and the washer
fluid level switch.
The washer reservoir cannot be repaired and, if
faulty or damaged, it must be replaced. The washer
reservoir, the grommet seals for the washer pump/
motor unit and the washer fluid level switch, 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 washer fluid level
switch is mounted just above the sump area of the
reservoir so that there will be 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) Drain the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - DRAIN/
ALL EXCEPT DIESEL ENGINE) or (Refer to 7 -
Fig. 3 Washer Reservoir
1 - FAN SHROUD
2 - LOW WASHER FLUID SENSOR
3 - WASHER PUMP
4 - WASHER RESERVOIR
8R - 10 WIPERS/WASHERSBR/BE
WASHER PUMP/MOTOR (Continued)

COOLING - STANDARD PROCEDURE - DRAIN/
DIESEL ENGINE).
(3) Disconnect the upper radiator hose from the
radiator.
(4) Disconnect the headlamp and dash wire har-
ness connector for the washer fluid level switch from
the switch connector receptacle.
(5) Disconnect the headlamp and dash wire har-
ness connector for the washer pump/motor unit from
the motor connector receptacle.
(6) Disconnect the washer hose from the barbed
outlet nipple of the washer pump/motor and allow
the washer fluid to drain into a clean container for
reuse.
(7) While pulling the washer reservoir away from
the fan shroud, lift the reservoir upwards far enough
to disengage the reservoir mounting tabs from the
keyed upper and lower mounting slots in the fan
shroud (Fig. 4).
(8) Remove the washer reservoir from the engine
compartment.
INSTALLATION
(1) Position the washer reservoir into the engine
compartment (Fig. 4).
(2) Align and insert the upper and lower washer
reservoir mounting tabs into the keyed upper and
lower mounting slots in the radiator fan shroud.
When all the tabs are inserted, use hand pressure to
push the reservoir downwards far enough to engage
the mounting tabs in the keyways of the mounting
slots.(3) Reconnect the washer hose to the barbed outlet
nipple of the washer pump.
(4) Reconnect the headlamp and dash wire harness
connector for the washer pump/motor unit to the
motor connector receptacle.
(5) Reconnect the headlamp and dash wire harness
connector for the washer fluid level switch to the
switch connector receptacle.
(6) Reconnect the upper radiator hose to the radi-
ator.
(7) Refill the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - REFILL/
ALL EXCEPT DIESEL ENGINE) or (Refer to 7 -
COOLING - STANDARD PROCEDURE - REFILL/
DIESEL ENGINE).
(8) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(9) Reconnect the battery negative cable.
WIPER ARM
DESCRIPTION
The wiper arms are the rigid members located
between the wiper pivots that protrude from the cowl
plenum cover/grille panel near the base of the wind-
shield and the wiper blades on the windshield glass.
The wiper arm has a die cast metal pivot end. On the
underside of this pivot end is a socket formation with
internal serrations and a small, movable, stamped
steel latch plate that is secured loosely under a small
strap that is staked to the pivot end. The wide end of
a tapered, stamped steel channel hinges on and is
secured with a hinge pin to the pivot end of the
wiper arm. One end of a long, rigid, stamped steel
strap, with a small hole near its pivot end, is riveted
and crimped within the narrow end of the stamped
steel channel. The tip of the wiper blade end of this
strap is bent back under itself to form a small hook.
Concealed within the stamped steel channel, one end
of a long spring is hooked through a hole in a small
stamped steel strap on the hinge pin within the die
cast pivot end, while the other end of the spring is
hooked through the small hole in the steel strap. The
entire wiper arm has a satin black finish applied to
all of its visible surfaces.
A wiper arm cannot be adjusted or repaired. If
damaged or faulty, the entire wiper arm unit must be
replaced.
OPERATION
The wiper arms are designed to mechanically
transmit the motion from the wiper pivots to the
wiper blades. The wiper arm must be properly
indexed to the wiper pivot in order to maintain the
Fig. 4 Washer Reservoir
1 - FAN SHROUD
2 - WASHER FLUID LEVEL SWITCH
3 - WASHER PUMP
4 - WASHER RESERVOIR
BR/BEWIPERS/WASHERS 8R - 11
WASHER RESERVOIR (Continued)

proper wiper blade travel on the glass. The socket
formation with internal serrations in the wiper arm
pivot end interlocks with the serrations on the outer
circumference of the wiper pivot driver, allowing pos-
itive engagement and finite adjustment of this con-
nection. The latch plate on the underside of the
wiper arm pivot end locks the wiper arm to the wiper
pivot when in its installed position and, when in its
unlocked position, also serves as a blocker to hold the
spring-loaded wiper arm off of the glass to facilitate
removal and installation. The spring-loaded wiper
arm hinge controls the down-force applied through
the tip of the wiper arm to the wiper blade on the
glass. The hook formation on the tip of the wiper arm
provides a cradle for securing and latching the wiper
blade pivot block to the wiper arm.
REMOVAL
(1) Unlatch and open the hood.
(2) Lift the wiper arm far enough to raise the
wiper blade off of the glass and permit the wiper arm
latch plate to be pulled out to its holding position,
then release the arm (Fig. 5). The wiper arm and
blade will remain off the glass with the latch in this
position.
CAUTION: The use of a screwdriver or other prying
tool to remove a wiper arm may distort it. This dis-
tortion could allow the arm to come off of the wiper
pivot during wiper operation, regardless of how
carefully it is reinstalled.
(3) Using a slight rocking motion, remove the
wiper arm pivot end from the wiper pivot.
INSTALLATION
NOTE: Be certain that the wiper motor is in the park
position before attempting to install the wiper arms.
Turn the ignition switch to the On position and
move the wiper control knob on the end of the
multi-function switch control stalk to its Off posi-
tion. If the wiper pivots move, wait until they stop
moving, then turn the ignition switch back to theOff position. The wiper motor is now in its park
position.
(1) The wiper arms must be indexed to the wiper
pivots with the wiper motor in the park position to
be properly installed (Fig. 6). Position the wiper arm
pivot ends onto the wiper pivots so that the lower
edge of the wiper arm tip is on the upper edge of the
lower windshield blackout area   22 millimeters ( 
0.86 inches).
(2) Once the wiper arm is indexed to the wiper
pivot, lift the wiper arm away from the windshield
slightly to relieve the spring tension on the latch
plate, then push the latch plate into the locked posi-
tion. Gently lower the wiper arm until the wiper
blade rests on the glass.
(3) Wet the windshield glass, then operate the wip-
ers. Turn the wiper control knob on the end of the
multi-function switch control stalk to the Off posi-
tion, then check for the correct wiper arm position
and adjust as required.
WIPER BLADE
DESCRIPTION
Each wiper blade is secured by an integral latching
pivot block to the hook formation on the tip of the
wiper arms, and rests on the glass near the base of
the windshield when the wipers are not in operation.
The wiper blade consists of the following components:
²Superstructure- The superstructure includes
several stamped steel bridges and links with claw
formations that grip the wiper blade element. Also
included in this unit is the latching, molded plastic
pivot block that secures the superstructure to the
wiper arm. All of the metal components of the wiper
blade have a satin black finish applied.
²Element- The wiper element or squeegee is the
resilient rubber member of the wiper blade that con-
tacts the glass.
²Flexor- The flexor is a rigid metal component
running along the length of each side of the wiper
element where it is gripped by the claws of the
superstructure.Fig. 5 Wiper Arm Remove/Install - Typical
Fig. 6 Wiper Arm Installation
8R - 12 WIPERS/WASHERSBR/BE
WIPER ARM (Continued)

All Ram truck models have two 50 centimeter
(19.69 inch) wiper blades with non-replaceable rub-
ber elements (squeegees). These wiper blades also
include an anti-lift feature. The wiper blades cannot
be adjusted or repaired. If faulty, worn, or damaged
the entire wiper blade unit must be replaced.
OPERATION
The wiper blade is moved back and forth across the
glass by the wiper arms when the wipers are being
operated. The wiper blade superstructure is the flex-
ible frame that grips the wiper blade element and
evenly distributes the force of the spring-loaded
wiper arm along the length of the element. The com-
bination of the wiper arm force and the flexibility of
the superstructure makes the element conform to
and maintain proper contact with the glass, even as
the blade is moved over the varied curvature found
across the glass surface. The wiper element flexor
provides the claws of the blade superstructure with a
rigid, yet flexible component on the element which
can be gripped. The rubber element is designed to be
stiff enough to maintain an even cleaning edge as it
is drawn across the glass, but resilient enough to
conform to the glass surface and flip from one clean-
ing edge to the other each time the wiper blade
changes directions.
REMOVAL
NOTE: The driver side and passenger side wiper
blades are not interchangeable. The driver side
wiper blade has an extra bridge and eight pairs of
claws securing the wiper element. The passenger
side wiper blade has six pairs of claws securing the
wiper element. The notched retainer end of both
wiper elements should always be oriented towards
the end of the wiper blade that is nearest to the
wiper pivot.
(1) Turn the wiper control knob on the end of the
multi-function switch control stalk to the On posi-
tion. Cycle the wiper blades to a convenient working
location on the windshield by turning the ignition
switch to the On and Off positions.
(2) Lift the wiper arm to raise the wiper blade and
element off of the glass.
(3) To remove the wiper blade from the wiper arm,
push the pivot block latch release tab under the tip
of the arm and slide the blade away from the tip
towards the pivot end of the arm far enough to dis-
engage the pivot block from the hook (Fig. 7).
(4) Extract the hook formation on the tip of the
wiper arm from the opening in the wiper blade
superstructure ahead of the wiper blade pivot block/
latch unit.CAUTION: Do not allow the wiper arm to spring
back against the glass without the wiper blade in
place or the glass may be damaged.
(5) Gently lower the wiper arm tip onto the glass.
INSTALLATION
NOTE: The driver side and passenger side wiper
blades are not interchangeable. The driver side
wiper blade has an extra bridge and eight pairs of
claws securing the wiper element. The passenger
side wiper blade has six pairs of claws securing the
wiper element. The notched retainer end of both
wiper elements should always be oriented towards
the end of the wiper blade that is nearest to the
wiper pivot.
(1) Lift the wiper arm off of the windshield glass.
(2) Position the wiper blade near the hook forma-
tion on the tip of the arm with the notched retainer
for the wiper element oriented towards the end of the
wiper arm that is nearest to the wiper pivot.
(3) Insert the hook formation on the tip of the
wiper arm through the opening in the wiper blade
superstructure ahead of the wiper blade pivot block/
latch unit far enough to engage the pivot block with
the hook (Fig. 7).
(4) Slide the wiper blade pivot block/latch up into
the hook formation on the tip of the wiper arm until
the latch release tab snaps into its locked position.
(5) Gently lower the wiper blade onto the glass.
WIPER MODULE
DESCRIPTION
The wiper module is secured with screws to the
cowl plenum panel and concealed within the cowl
plenum area beneath the cowl plenum cover/grille
panel. The ends of the wiper pivot shafts that pro-
trude through dedicated openings in the cowl plenum
Fig. 7 Wiper Blade Remove/Install - Typical
1 - RELEASE TAB
BR/BEWIPERS/WASHERS 8R - 13
WIPER BLADE (Continued)

cover/grille panel to drive the wiper arms and blades
are the only visible components of the wiper module.
The wiper module consists of the following major
components:
²Bracket- The wiper module bracket consists of
a long tubular steel main member that has a
stamped pivot bracket formation near each end
where the two wiper pivots are secured. A stamped
steel mounting plate for the wiper motor is secured
with welds near the center of the main member.
²Crank Arm- The wiper motor crank arm is a
stamped steel unit that has a slotted hole on the
driven end that is secured to the wiper motor output
shaft with a nut, and has a ball stud secured to the
drive end.
²Linkage- The two wiper linkage members are
each constructed of stamped steel. A driver side drive
link with a plastic socket-type bushing in the left
end, and a plastic sleeve-type bushing in the right
end. Socket bushing is snap-fit over the pivot ball
stud on the left pivot, while the sleeve bushing is fit
over the longer wiper motor crank arm pivot stud.
The passenger side drive link has a plastic socket-
type bushing on each end. One end of this drive link
is snap-fit over the pivot ball stud on the right pivot,
while the other end is snap-fit over the exposed end
of the longer ball stud on the wiper motor crank arm.
²Motor- The wiper motor is secured with three
screws to the motor mounting plate near the center
of the wiper module bracket. The wiper motor output
shaft passes through a hole in the module bracket,
where a nut secures the wiper motor crank arm to
the motor output shaft. The two-speed permanent
magnet wiper motor features an integral transmis-
sion, an internal park switch, and an internal Posi-
tive Temperature Coefficient (PTC) circuit breaker.
²Pivots- The two wiper pivots are secured to the
ends of the wiper module bracket. The crank arms
that extend from the bottom of the pivot shafts each
have a ball stud on their end. The upper end of each
pivot shaft where the wiper arms will be fastened
each has an externally serrated drum secured to it.
The wiper module cannot be adjusted or repaired.
If any component of the module is faulty or damaged,
the entire wiper module unit must be replaced.
OPERATION
The wiper module operation is controlled by the
vehicle operator through battery current inputs
received by the wiper motor from the multi-function
switch on the steering column. The wiper motor
speed is controlled by current flow to either the low
speed or the high speed set of brushes. The park
switch is a single pole, single throw, momentary
switch within the wiper motor that is mechanically
actuated by the wiper motor transmission compo-nents. The park switch alternately closes the wiper
park switch sense circuit to ground or to battery cur-
rent, depending upon the position of the wipers on
the glass. This feature allows the motor to complete
its current wipe cycle after the wiper system has
been turned Off, and to park the wiper blades in the
lowest portion of the wipe pattern. The automatic
resetting circuit breaker protects the motor from
overloads. The wiper motor crank arm, the two wiper
linkage members, and the two wiper pivots mechan-
ically convert the rotary output of the wiper motor to
the back and forth wiping motion of the wiper arms
and blades on the glass.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the wiper arms from the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARMS - REMOVAL).
(3) Remove the cowl plenum cover/grille panel
from the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE - REMOVAL).
(4) Remove the four screws that secure the wiper
module bracket to the cowl plenum panel and the
dash panel (Fig. 8).
(5) Reach into the cowl plenum to move the wiper
module far enough to access the wiper module elec-
trical connections (Fig. 9).
(6) Disconnect the headlamp and dash wire har-
ness connector for the wiper motor from the wiper
motor pigtail wire connector.
(7) Disconnect the headlamp and dash wire har-
ness ground connector from the wiper motor ground
terminal.
(8) Remove the wiper module from the cowl ple-
num as a unit.
INSTALLATION
(1) Position the wiper module into the cowl ple-
num as a unit.
Fig. 8 Wiper Module Remove/Install
1 - WIPER MODULE MOUNTING SCREWS
8R - 14 WIPERS/WASHERSBR/BE
WIPER MODULE (Continued)

(2) Reconnect the headlamp and dash wire harness
ground connector to the wiper motor ground terminal
(Fig. 9).
(3) Reconnect the headlamp and dash wire harness
connector for the wiper motor to the wiper motor pig-
tail wire connector.
(4) Reach into the cowl plenum to align the wiper
module mounting bracket with the locations for the
mounting screws (Fig. 8).
(5) Install and tighten the four screws that secure
the wiper module bracket to the cowl plenum panel
and the dash panel. Tighten the screws to 8 N´m (72
in. lbs.).
(6) Reinstall the cowl plenum cover/grille panel
onto the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE - INSTALLATION).
(7) Reinstall the wiper arms onto the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARMS - INSTALLATION).
(8) Reconnect the battery negative cable.
WIPER RELAY
DESCRIPTION
The wiper relay (or intermittent wipe relay) is
located in the Power Distribution Center (PDC) near
the battery in the engine compartment. See the fuse
and relay layout label affixed to the inside surface of
the PDC cover for wiper relay identification and loca-
tion. The wiper relay is a conventional International
Standards Organization (ISO) micro relay. Relays
conforming to the ISO specifications have common
physical dimensions, current capacities, terminal pat-
terns, and terminal functions. The relay is containedwithin a small, rectangular, molded plastic housing.
The relay is connected to all of the required inputs
and outputs through its PDC receptacle by five male
spade-type terminals that extend from the bottom of
the relay base. The ISO designation for each termi-
nal is molded into the base adjacent to the terminal.
The ISO terminal designations are as follows:
²30 (Common Feed)- This terminal is con-
nected to the movable contact point of the relay.
²85 (Coil Ground)- This terminal is connected
to the ground feed side of the relay control coil.
²86 (Coil Battery)- This terminal is connected
to the battery feed side of the relay control coil.
²87 (Normally Open)- This terminal is con-
nected to the normally open fixed contact point of the
relay.
²87A (Normally Closed)- This terminal is con-
nected to the normally closed fixed contact point of
the relay.
The wiper relay cannot be adjusted or repaired. If
the relay is damaged or faulty, it must be replaced.
OPERATION
The wiper relay (or intermittent wipe relay) is an
electromechanical switch that uses a low current
input from the Central Timer Module (CTM) to con-
trol a high current output to the low speed brush of
the wiper motor. The movable common feed contact
point is held against the fixed normally closed con-
tact point by spring pressure. When the relay coil is
energized, an electromagnetic field is produced by the
coil windings. This electromagnetic field draws the
movable relay contact point away from the fixed nor-
mally closed contact point, and holds it against the
fixed normally open contact point. When the relay
coil is de-energized, spring pressure returns the mov-
able contact point back against the fixed normally
closed contact point. A resistor or diode is connected
in parallel with the relay coil in the relay, and helps
to dissipate voltage spikes and electromagnetic inter-
ference that can be generated as the electromagnetic
field of the relay coil collapses.
The wiper relay terminals are connected to the
vehicle electrical system through a connector recepta-
cle in the Power Distribution Center (PDC). The
inputs and outputs of the wiper relay include:
²The common feed terminal (30) is connected to
the wiper motor low speed brush through the wiper
control circuitry of the multi-function switch on the
steering column. When the wiper relay is de-ener-
gized, the common feed terminal is connected to the
wiper park switch output through the wiper park
switch sense circuit. The wiper park switch output
may be battery current (wipers are not parked), or
ground (wipers are parked). When the wiper relay is
energized, the common feed terminal of the wiper is
Fig. 9 Wiper Module Electrical Connections
1 - GROUND CONNECTOR
2 - WIPER MOTOR CONNECTOR
3 - GROUND TERMINAL
BR/BEWIPERS/WASHERS 8R - 15
WIPER MODULE (Continued)

connected to battery current from a fuse in the Junc-
tion Block (JB) through a fused ignition switch out-
put (run-acc) circuit.
²The coil ground terminal (85) is connected to the
relay control output of the CTM through the wiper
motor relay control circuit. The CTM controls the
ground path for this circuit internally to energize or
de-energize the wiper relay based upon its program-
ming and inputs from the wiper and washer control
circuitry of the multi-function switch and from the
wiper motor park switch.
²The coil battery terminal (86) is connected to
battery current from a fuse in the Junction Block
(JB) through a fused ignition switch output (run-acc)
circuit whenever the ignition switch is in the On or
Accessory positions.
²The normally open terminal (87) is connected to
battery current from a fuse in the Junction Block
(JB) through a fused ignition switch output (run-acc)
circuit whenever the wiper relay control coil is ener-
gized by the CTM. This circuit provides fused igni-
tion switch output (run-acc) current to the wiper
motor low speed brush only when the wiper relay
control coil is energized.
²The normally closed terminal (87A) is connected
to the output of the wiper motor park switch through
the wiper motor park switch sense circuit. This cir-
cuit provides battery current (wipers are not parked)
or ground (wipers are parked) to the wiper motor low
speed brush whenever the wiper relay control coil is
de-energized and the Off position of the wiper control
of the multi-function switch is selected.
The wiper relay can be diagnosed using conven-
tional diagnostic tools and methods.
DIAGNOSIS AND TESTING - WIPER RELAY
The wiper relay (or intermittent wipe relay) (Fig.
10) is located in the Power Distribution Center (PDC)
in the engine compartment. See the fuse and relay
layout label affixed to the inside surface of the PDC
cover for wiper relay identification and location.
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
(1) Remove the wiper relay from the PDC. (Refer
to 8 - ELECTRICAL/WIPERS/WASHERS/WIPER
RELAY - REMOVAL).
(2) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 3. If not OK, replace the faulty relay.(3) Resistance between terminals 85 and 86 (elec-
tromagnet) should be 75   5 ohms. If OK, go to Step
4. If not OK, replace the faulty relay.
(4) Connect a battery to terminals 85 and 86.
There should now be continuity between terminals
30 and 87, and no continuity between terminals 87A
and 30. If OK, test the relay input and output cir-
cuits. Refer to RELAY CIRCUIT TEST . If not OK,
replace the faulty relay.
RELAY CIRCUIT TEST
(1) The relay common feed terminal cavity (30) is
connected to the multi-function switch. There should
be continuity between the receptacle for terminal 30
of the wiper relay in the PDC and both driver low
speed wiper motor driver circuit cavities of the
instrument panel wire harness connector for the
multi-function switch at all times. If OK, go to Step
2. If not OK, repair the open driver low speed wiper
motor driver circuit(s) between the PDC and the
multi-function switch as required.
(2) The relay normally closed terminal (87A) is
connected to the wiper motor park switch through
the wiper motor park switch sense circuit. There
should be continuity between the receptacle for ter-
minal 87A of the wiper relay in the PDC and the
wiper motor park switch sense circuit cavity of the
headlamp and dash wire harness connector for the
wiper motor at all times. If OK, go to Step 3. If not
OK, repair the open wiper motor park switch sense
circuit between the PDC and the wiper motor as
required.
(3) The relay normally open terminal (87) is con-
nected to a fused ignition switch output (run-acc)
fuse in the Junction Block (JB) through a fused igni-
tion switch output (run-acc) circuit. There should be
battery voltage at the receptacle for terminal 87 of
Fig. 10 Wiper Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
8R - 16 WIPERS/WASHERSBR/BE
WIPER RELAY (Continued)

the wiper relay in the PDC whenever the ignition
switch is in the On or Accessory positions. If OK, go
to Step 4. If not OK, repair the open fused ignition
switch output (run-acc) circuit between the PDC and
the JB as required.
(4) The coil battery terminal (86) is connected to a
fused ignition switch output (run-acc) fuse in the JB
through a fused ignition switch output (run-acc) cir-
cuit. There should be battery voltage at the recepta-
cle for terminal 86 of the wiper relay in the PDC
whenever the ignition switch is in the On or Acces-
sory positions. If OK, go to Step 5. If not OK, repair
the open fused ignition switch output (run-acc) cir-
cuit between the PDC and the JB as required.
(5) The coil ground terminal (85) is connected to
the output of the Central Timer Module (CTM)
through the wiper motor relay control circuit. There
should be continuity between the receptacle for ter-
minal 85 of the wiper relay in the PDC and the wiper
motor relay control circuit cavity of the instrument
panel wire harness connector (Connector C1) for the
CTM at all times. If not OK, repair the open wiper
motor relay control circuit between the PDC and the
CTM as required.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the cover from the Power Distribution
Center (PDC) (Fig. 11).
(3) See the fuse and relay layout label affixed to
the underside of the PDC cover for wiper relay iden-
tification and location.
(4) Remove the wiper relay by grasping it firmly
and pulling it straight out from the receptacle in the
PDC.
INSTALLATION
(1) See the fuse and relay layout label affixed to
the underside of the PDC cover for the proper wiper
relay location (Fig. 11).
(2) Position the wiper relay in the proper recepta-
cle in the PDC.
(3) Align the wiper relay terminals with the termi-
nal cavities in the PDC receptacle.
(4) Push firmly and evenly on the top of the wiper
relay until the terminals are fully seated in the ter-
minal cavities in the PDC receptacle.
(5) Reinstall the cover onto the PDC.
Fig. 11 Power Distribution Center
1 - COVER
2 - POWER DISTRIBUTION CENTER
BR/BEWIPERS/WASHERS 8R - 17
WIPER RELAY (Continued)