wiper motor DODGE RAM 1500 1998 2.G User Guide

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 nozzles are con-
structed of molded plastic. The cowl plenum cover/
grille panel must be removed from the vehicle to
access the nozzles for service. The washer nozzles
cannot be adjusted or repaired. 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 unit through a single hose,
which is attached to a barbed nipple on each washer
nozzle below the cowl plenum cover/grille panel. A
fluidic matrix within the washer nozzle causes the
pressurized washer fluid to be emitted from the noz-
zle orifice as an oscillating stream to more effectively
cover a larger area of the glass to be cleaned.
REMOVAL
(1) Remove both wiper arms from the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARM - REMOVAL).
(2) Unlatch and open the hood.
(3) Remove the cowl plenum cover/grille panel
from over the cowl plenum. (Refer to 23 - BODY/EX-
TERIOR/COWL GRILLE - REMOVAL).(4) From the underside of the cowl plenum cover/
grille panel, disconnect the washer nozzle hose from
the barbed nipple of the washer nozzle (Fig. 11).
(5) From the underside of the cowl plenum cover/
grille panel, release the integral snap features of the
washer nozzle and push the nozzle out through the
mounting hole toward the top side of the cowl ple-
num cover/grille panel.
(6) Remove the washer nozzle from the top of the
cowl plenum cover/grille panel.
INSTALLATION
(1) From the top of the cowl plenum cover/grille
panel, position the nipple end of the washer nozzle
through the mounting hole and engage the anti-rota-
tion tab of the nipple into the anti-rotation notch in
the mounting hole.
(2) Using hand pressure, push firmly and evenly
on the top of the washer nozzle until the integral
snap features lock into place on the underside of the
cowl plenum cover/grille panel.
(3) From the underside of the cowl plenum cover/
grille panel, reconnect the washer hose to the barbed
nipple of the washer nozzle (Fig. 11).
(4) Reinstall the washer hose for the washer noz-
zle into its routing clips on the underside of the cowl
plenum cover/grille panel.
(5) Reinstall the cowl plenum cover/grille panel
over the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE - INSTALLATION).
(6) Close and latch the hood.
Fig. 10 Washer Nozzle
1 - HOOD
2 - LATCH (2)
3 - NIPPLE
4 - ANTI-ROTATION TAB
5 - ORIFICE
Fig. 11 Washer Nozzle Remove/Install
1 - COWL PLENUM COVER/GRILLE PANEL (UNDERSIDE)
2 - ANTI-ROTATION TAB (LARGE)
3 - NIPPLE
4 - ANTI-ROTATION TAB (SMALL)
5 - PLIERS
6 - LATCH (2)
8R - 12 WIPERS/WASHERSDR
WASHER NOZZLE (Continued)

(7) Reinstall both wiper arms onto the wiper piv-
ots. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARM - INSTALLATION).
WASHER PUMP/MOTOR
DESCRIPTION
The washer pump/motor unit (Fig. 12) is located on
the rearward facing surface of the washer reservoir,
in the right (except diesel engine) or left (diesel
engine only) front corner of the engine compartment.
A small permanently lubricated and sealed electric
motor is coupled to the rotor-type washer pump. A
seal flange with a barbed inlet nipple on the pump
housing passes through a rubber grommet seal
installed in a dedicated mounting hole of the washer
reservoir. When the pump is installed in the reser-
voir a barbed outlet nipple on the pump housing con-
nects the unit to the washer system through a short
washer reservoir 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. The top of the washer pump is also
secured to the washer reservoir by the use of a snappost on the motor housing and a snap post 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. 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 features a small
Direct Current (DC) electric motor. The motor is con-
nected to the vehicle electrical system through a sin-
gle take out and two-cavity connector of the right
(except diesel engine) or left (diesel engine only)
headlamp and dash wire harness. The motor is
grounded at all times through another take out of
the right (except diesel engine) or left (diesel engine
only) headlamp and dash wire harness. On models
without the diesel engine, a single eyelet terminal
connector is secured by a nut to a ground stud
located on the right front fender inner shield in the
engine compartment. On models with a diesel engine,
an eyelet terminal connector is secured by a ground
screw to the left front fender inner shield in the
engine compartment. The motor receives battery cur-
rent on a washer pump/motor control circuit.
The washer pump/motor control circuit is energized
through a high side driver within the Front Control
Module (FCM) whenever the FCM receives an elec-
tronic message requesting washer system operation
from the instrument cluster over the Programmable
Communications Interface (PCI) data bus. The
instrument cluster monitors a resistor multiplexed
hard wired input from the momentary washer switch
contacts within the multi-function switch on the
steering column to determine when it should issue
the electronic message requesting washer system
operation.
Washer fluid is gravity-fed from the washer reser-
voir to the inlet side of the washer pump. When the
pump motor is energized, the motor spins the rotor
within the washer pump. The spinning pump rotor
pressurizes the washer fluid and forces it through
the pump outlet nipple, the washer plumbing, and
the washer nozzles onto the windshield glass.
The washer pump/motor unit may be diagnosed
using conventional diagnostic tools and methods.
However, conventional diagnostic methods may not
prove conclusive in the diagnosis of the instrument
cluster, the FCM, or the electronic message inputs to
or outputs from the instrument cluster and the FCM
that control the operation of the washer pump/motor
unit. The most reliable, efficient, and accurate means
to diagnose the washer pump/motor unit, the instru-
ment cluster, the FCM, or the electronic message
Fig. 12 Washer Pump/Motor
1 - MOTOR
2 - SNAP POST
3 - CONNECTOR RECEPTACLE
4 - PUMP
5 - OUTLET NIPPLE
6 - INLET NIPPLE
7 - FILTER SCREEN
DRWIPERS/WASHERS 8R - 13
WASHER NOZZLE (Continued)

inputs and outputs related to the washer pump/mo-
tor unit operation requires the use of a DRBIIItscan
tool. Refer to the appropriate diagnostic information.
REMOVAL
The washer pump/motor unit can be removed from
the washer reservoir without removing the reservoir
from the vehicle.
(1) Unlatch and open the hood.
(2) Disconnect and isolate the battery negative
cable.
(3) 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.
(4) Disconnect the right (except diesel engine) or
left (diesel engine only) headlamp and dash wire har-
ness connector for the washer pump/motor unit from
the motor connector receptacle (Fig. 13).
(5) Firmly grasp the top of the washer pump/motor
housing.
(6) Pull lightly outward on the top of the washer
pump/motor housing away from the washer reservoir
far enough to disengage the snap post on the top of
the motor from the receptacle in the reservoir.(7) Pull the washer pump/motor unit straight out
from the washer reservoir far enough to disengage
the barbed pump inlet nipple from the rubber grom-
met seal in the reservoir.
(8) Disconnect the reservoir washer hose from the
washer pump/motor unit outlet nipple.
(9) Remove washer pump/motor unit from the back
of the washer reservoir.
(10) Remove the rubber grommet seal from 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 washer res-
ervoir (Fig. 13).
(3) Using hand pressure, press on the washer
pump/motor unit firmly and evenly until the barbed
inlet nipple is fully seated in the rubber grommet
seal in the washer reservoir mounting hole.
(4) Align the washer pump/motor snap post on the
top of the motor housing with the snap post recepta-
cle in the washer reservoir.
(5) Using hand pressure, press firmly and evenly
on the top of washer pump/motor unit until the snap
post snaps into the washer reservoir receptacle.
(6) Reconnect the washer reservoir hose to the
barbed outlet nipple of the washer pump.
(7) Reconnect the right (except diesel engine) or
left (diesel engine only) headlamp and dash wire har-
ness connector for the washer pump/motor unit to
the motor connector receptacle.
(8) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(9) Reconnect the battery negative cable.
(10) Close and latch the hood.
WASHER RESERVOIR
DESCRIPTION
Except on models equipped with an optional diesel
engine, the molded plastic washer fluid reservoir is
mounted on the right rearward facing surface of the
cooling module radiator shroud in the engine com-
partment (Fig. 14). On models with the diesel engine,
the molded plastic washer fluid reservoir is mounted
on the rearward facing surface of the left vertical
member of the radiator support in the engine com-
partment. The reservoir is a molded unit constructed
of a translucent plastic that allows the washer fluid
level to be inspected without removing the washer
Fig. 13 Washer Pump/Motor Remove/Install
1 - CONNECTOR RECEPTACLE
2 - SNAP POST
3 - SNAP POST RECEPTACLE
4 - GROMMET SEAL
5 - WASHER FLUID LEVEL SWITCH
6 - WASHER RESERVOIR
7 - INLET NIPPLE
8 - OUTLET NIPPLE
8R - 14 WIPERS/WASHERSDR
WASHER PUMP/MOTOR (Continued)

reservoir cap. The most visible component of the
washer reservoir is the filler cap unit, which is
secured to and hinges on a hook feature that is inte-
gral to the filler neck near the top of the reservoir.
The bright yellow plastic filler cap snaps over the
filler neck opening and seals the reservoir opening
with an integral rubber gasket. The filler cap is
labeled with an International Control and Display
Symbol icon for ªWindshield Washerº and the text
ªWasher Fluid Onlyº that are molded into it and
highlighted in black against the yellow plastic cap for
visibility.
There are dedicated holes near the bottom of the
rearward facing side of the reservoir provided for the
mounting of the washer pump/motor unit and the
washer fluid level switch. A snap post receptacle
molded into the reservoir allows for mounting of the
washer pump without the use of fasteners. The res-
ervoir also features an integral hose routing trough
on its rearward facing side. Except on models with a
diesel engine, the washer reservoir is secured to the
cooling module radiator shroud with three integral
tabs, two at the bottom and one at the top. The two
bottom tabs are inserted into two slots near the bot-tom of the shroud, while the upper tab slides into an
integral channel-like slot near the top of the shroud.
A molded lock feature on the forward facing surface
of the reservoir engages a molded depression on the
rearward facing surface of the radiator shroud when
the reservoir is fully seated on the shroud, locking
the unit securely in place. On models with a diesel
engine, the washer reservoir is secured with two
screws through integral mounting tabs to the left
vertical member of the radiator support. On many
models, a molded plastic coolant recovery container
or a coolant pressure container must be detached
from the top of the cooling module and moved aside
to access the washer fluid reservoir for service. This
may be accomplished without opening or draining the
engine cooling system.
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 pump/motor
unit is mounted in the lowest position in the sump.
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, well before the washer sys-
tem will no longer operate.
REMOVAL
REMOVAL - EXCEPT DIESEL ENGINE
(1) Unlatch and open the hood.
(2) Disconnect and isolate the battery negative
cable.
(3) Remove the fasteners securing the coolant
recovery container or the coolant pressure container
to the top of the cooling module and move the con-
tainer aside. It is not necessary to open or drain the
engine cooling system. (Refer to 7 - COOLING/EN-
GINE/COOLANT RECOVERY CONTAINER -
REMOVAL) or (Refer to 7 - COOLING/ENGINE/
COOLANT RECOVERY PRESSURE CONTAINER -
REMOVAL).
(4) Disconnect the reservoir washer hose from the
barbed nipple of the inline fitting at the engine com-
partment washer hose in the right headlamp and
dash wire harness and allow the washer fluid to
Fig. 14 Washer Reservoir - except Diesel Engine
1-TOPTAB
2 - HOOK FEATURE
3 - CAP
4 - RESERVOIR
5 - TROUGH
6 - HOSE
7 - LOCK FEATURE
8 - WASHER FLUID LEVEL SWITCH
9 - WASHER PUMP/MOTOR
10 - BOTTOM TAB (2)
DRWIPERS/WASHERS 8R - 15
WASHER RESERVOIR (Continued)

drain from the reservoir into a clean container for
reuse (Fig. 15).
(5) Disconnect the right headlamp and dash wire
harness connector for the washer fluid level switch
from the switch connector receptacle.
(6) Disconnect the right headlamp and dash wire
harness connector for the washer pump/motor unit
from the motor connector receptacle.
(7) Grasp the bottom of the washer reservoir
firmly with both hands and pull the unit sharply
upward to disengage the locking feature on the
washer reservoir from the depression in the radiator
shroud.
(8) Continue lifting the washer reservoir upward
far enough to disengage the three mounting tabs (one
at the top and two at the bottom) from the channel-
like slot at the top and the two slots at the bottom of
the radiator shroud.
(9) Remove the washer reservoir from the right
side of the engine compartment.REMOVAL - DIESEL ENGINE
(1) Unlatch and open the hood.
(2) Disconnect and isolate the battery negative
cable.
(3) Disengage the reservoir washer hose from the
integral routing clips on the top of the radiator fan
shroud (Fig. 16).
(4) Disconnect the reservoir washer hose from the
barbed nipple of the inline fitting at the engine com-
partment washer hose in the right headlamp and
dash wire harness and allow the washer fluid to
drain from the reservoir into a clean container for
reuse.
(5) Disconnect the left headlamp and dash wire
harness connector for the washer fluid level switch
from the switch connector receptacle.
(6) Disconnect the left headlamp and dash wire
harness connector for the washer pump/motor unit
from the motor connector receptacle.
(7) Remove the two screws that secure the washer
reservoir to the left vertical member of the radiator
support (Fig. 17).
(8) Remove the washer reservoir from the left side
of the engine compartment.
Fig. 15 Washer Reservoir Remove/Install
1-TOPTAB
2 - RADIATOR SHROUD
3 - TOP SLOT
4 - RIGHT HEADLAMP & DASH WIRE HARNESS
5 - ENGINE COMPARTMENT WASHER HOSE
6 - BOTTOM SLOT (2)
7 - RESERVOIR WASHER HOSE
8 - BOTTOM TAB (2)
9 - WASHER FLUID LEVEL SWITCH
10 - WASHER PUMP/MOTOR
11 - WASHER RESERVOIR
12 - LOCK FEATURE
Fig. 16 Washer Reservoir Connections - Diesel
Engine
1 - WIRE HARNESS
2 - WASHER RESERVOIR
3 - WASHER PUMP/MOTOR
4 - WASHER HOSE
5 - WASHER FLUID LEVEL SWITCH
8R - 16 WIPERS/WASHERSDR
WASHER RESERVOIR (Continued)

INSTALLATION
INSTALLATION - EXCEPT DIESEL ENGINE
(1) Position the washer reservoir into the right
side of the engine compartment.
(2) Align and insert the three mounting tabs (one
at the top and two at the bottom) into the two slots
at the bottom and the channel-like slot at the top of
the radiator shroud (Fig. 15).
(3) Place both hands on the top of the washer res-
ervoir and push the unit downward far enough for
the locking feature on the washer reservoir to snap
into the depression in the radiator shroud.
(4) Reconnect the right headlamp and dash wire
harness connector for the washer pump/motor unit to
the motor connector receptacle.
(5) Reconnect the right headlamp and dash wire
harness connector for the washer fluid level switch to
the switch connector receptacle.
(6) Reconnect the reservoir washer hose to the
barbed nipple of the inline fitting at the engine com-
partment washer hose in the right headlamp and
dash wire harness.
(7) Reposition the coolant recovery container or the
coolant pressure container to the top of the cooling
module and reinstall the fasteners that secure it
there. (Refer to 7 - COOLING/ENGINE/COOLANT
RECOVERY CONTAINER - INSTALLATION) or
(Refer to 7 - COOLING/ENGINE/COOLANT RECOV-
ERY PRESSURE CONTAINER - INSTALLATION).
(8) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(9) Reconnect the battery negative cable.
(10) Close and latch the hood.
INSTALLATION - DIESEL ENGINE
(1) Position the washer reservoir into the left side
of the engine compartment (Fig. 17).
(2) Install and tighten the two screws that secure
the washer reservoir to the left vertical member of
the radiator support. Tighten the screws to 10 N´m
(85 in. lbs.).
(3) Reconnect the left headlamp and dash wire
harness connector for the washer pump/motor unit to
the motor connector receptacle (Fig. 16).
(4) Reconnect the left headlamp and dash wire
harness connector for the washer fluid level switch to
the switch connector receptacle.
(5) Reconnect the reservoir washer hose to the
barbed nipple of the inline fitting at the engine com-
partment washer hose in the right headlamp and
dash wire harness.
(6) Engage the reservoir washer hose into the inte-
gral routing clips on the top of the radiator fan
shroud.
(7) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
(8) Reconnect the battery negative cable.
(9) Close and latch the hood.
WIPER ARM
DESCRIPTION
The wiper arms are the rigid members located
between the wiper pivots that protrude from the cowl
Fig. 17 Washer Reservoir
Remove/Install - Diesel Engine
1 - RESERVOIR WASHER HOSE
2 - RADIATOR SUPPORT
3 - SCREW (2)
4 - WASHER RESERVOIR
Fig. 18 Wiper Arm
1 - HOOK
2 - STRAP
3 - PIVOT END
4 - KEY
5-LATCH
6 - HINGE PIN
7 - TENSION SPRING
8 - CHANNEL
DRWIPERS/WASHERS 8R - 17
WASHER RESERVOIR (Continued)

INSTALLATION
NOTE: The notched end of the wiper element flexor
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,
until the wiper arm hinge is in its over-center posi-
tion.
(2) Position the wiper blade near the hook forma-
tion on the tip of the arm with the notched end of the
wiper element flexor 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 into
the hook (Fig. 21).
(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.
Latch engagement will be accompanied by an audible
click.
(5) Gently lower the wiper blade onto the glass.
WIPER HIGH/LOW RELAY
DESCRIPTION
The wiper high/low relay is located in the Inte-
grated Power Module (IPM) in the engine compart-
ment near the battery. The wiper high/low relay is a
conventional International Standards Organization
(ISO) micro relay (Fig. 22). Relays conforming to the
ISO specifications have common physical dimensions,
current capacities, terminal patterns, and terminal
functions. The relay is contained within a small, rect-
angular, molded plastic housing and is connected to
all of the required inputs and outputs by five integralmale spade-type terminals that extend from the bot-
tom of the relay base.
The wiper high/low relay cannot be adjusted or
repaired and, if faulty or damaged, the unit must be
replaced.
OPERATION
The wiper high/low relay is an electromechanical
switch that uses a low current input from the Front
Control Module (FCM) to control a high current out-
put to the wiper motor. The movable common feed
contact point is held against the fixed normally
closed contact 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 normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor is connected in parallel with the relay coil in
the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as
the electromagnetic field of the relay coil collapses.
The wiper high/low relay terminals are connected
to the vehicle electrical system through a connector
receptacle in the Integrated Power Module (IPM).
The inputs and outputs of the wiper high/low relay
include:
²Common Feed Terminal- The common feed
terminal (30) is connected to the output of the wiper
on/off relay at all times through the wiper on/off
relay output circuit.
²Coil Ground Terminal- The coil ground termi-
nal (85) is connected to a control output of the Front
Control Module (FCM) through a wiper high/low
relay control circuit. The FCM controls wiper motor
operation by controlling a ground path through this
circuit.
²Coil Battery Terminal- The coil battery ter-
minal (86) receives battery current when the ignition
switch is in the On or Accessory positions from a fuse
in the Integrated Power Module (IPM) through a
fused ignition switch output (run-acc) circuit.
²Normally Open Terminal- The normally open
terminal (87) is connected to the high speed brush of
the wiper motor through a wiper high/low relay high
speed output circuit, and is connected to the high
speed brush whenever the relay is energized.
²Normally Closed Terminal- The normally
closed terminal (87A) is connected to the low speed
brush of the wiper motor through a wiper high/low
relay low speed output circuit, and is connected to
the low speed brush whenever the relay is de-ener-
gized.
Fig. 22 ISO Micro Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
8R - 20 WIPERS/WASHERSDR
WIPER BLADE (Continued)

INSTALLATION
(1) Position the wiper high/low relay to the proper
receptacle in the Integrated Power Module (IPM)
(Fig. 24).
(2) Align the wiper high/low relay terminals with
the terminal cavities in the IPM receptacle.
(3) Push firmly and evenly on the top of the wiper
high/low relay until the terminals are fully seated in
the terminal cavities in the IPM receptacle.
(4) Reinstall the cover onto the IPM.
(5) Reconnect the battery negative cable.
WIPER MODULE
DESCRIPTION
The wiper motor bracket is secured with two
screws below the wiper motor through two rubber
insulators to the bottom of the cowl plenum panel
beneath the cowl plenum cover/grille panel (Fig. 25).
Two screws secure the top of the wiper module
bracket to the cowl plenum panel through rubber
insulators located on the outboard end of each pivot
bracket. The ends of the wiper pivot shafts that pro-
trude through dedicated openings in the cowl plenum
cover/grille panel to drive the wiper arms and bladesare 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 die cast
pivot bracket formation near each end where the two
wiper pivots are secured. A stamped steel clamp
secures the center of the tubular member to the die
cast bracket integral to the wiper motor with two
screws.
²Crank Arm- The wiper motor crank arm is a
stamped steel unit with 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- Two stamped steel drive links con-
nect the wiper motor crank arm to the wiper pivot
lever arms. The left side drive link has a plastic sock-
et-type bushing on each end. The right side drive
link has a plastic socket-type bushing on one end,
and a plastic sleeve-type bushing on the other end.
The socket-type bushing on one end of each drive
link is snap-fit over the ball stud on the lever arm of
its respective pivot. The right side drive link sleeve-
type bushing end is then fit over the motor crank
arm ball stud, and the other socket-type bushing of
the left side drive link is snap-fit over the exposed
end of the wiper motor crank arm ball stud.
²Motor- The wiper motor features an integral
die cast bracket to which the wiper module bracket is
secured with a stamped steel clamp and two screws
near the top and which has two rubber insulated
mounting ears at the bottom. This die casting also
serves as the wiper motor transmission housing from
which the wiper motor output shaft exits. A nut
secures the wiper motor crank arm to the motor out-
put shaft. The two-speed permanent magnet wiper
motor features an integral transmission, an internal
park switch, and an internal automatic resetting cir-
cuit breaker.
²Pivots- The two front wiper pivots are secured
within the die cast pivot brackets on the outboard
ends of the wiper module main member. The lever
arms that extend from the center 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 fas-
tened each has a serrated driver with a keyway. The
lower ends of the pivot shafts are installed through
lubricated bushings in the pivot brackets and are
secured with snap rings.
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.
Fig. 25 Wiper Module
1 - PIVOT BRACKET (2)
2 - TUBE
3 - CLAMP
4 - PIVOT SHAFT (2)
5 - INSULATOR (4)
6 - LINKAGE BUSHING (4)
7 - DRIVE LINK (2)
8 - PIVOT CRANK ARM (2)
9 - PIGTAIL WIRE CONNECTOR
10 - MOTOR CRANK ARM
11 - WIPER MOTOR
8R - 22 WIPERS/WASHERSDR
WIPER HIGH/LOW RELAY (Continued)

OPERATION
The wiper module operation is controlled by the
battery current inputs received by the wiper motor
through the wiper on/off and wiper high/low relays.
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 components. The park switch alter-
nately opens and closes the wiper park switch sense
circuit to ground, depending upon the position of the
wipers on the glass. This feature allows the motor to
complete its current wipe cycle after the wiper sys-
tem 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 mechanically 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) Remove both wiper arms from the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARM - REMOVAL).
(2) Unlatch and open the hood.
(3) Disconnect and isolate the battery negative
cable.
(4) Remove the cowl plenum cover/grille panel
from over the cowl plenum. (Refer to 23 - BODY/EX-
TERIOR/COWL GRILLE - REMOVAL).
(5) Disconnect the left headlamp and dash wire
harness connector for the wiper motor from the
motor pigtail wire connector (Fig. 26).(6) Remove the two screws that secure the wiper
module to the top of the cowl plenum panel at the
pivot brackets.
(7) Remove the two screws that secure the wiper
module to the bottom of the cowl plenum panel.
(8) Remove the wiper module from the cowl ple-
num panel as a unit.
INSTALLATION
(1) Position the wiper module into the cowl ple-
num as a unit (Fig. 26).
(2) Install the two screws that secure the wiper
module to the top of the cowl plenum panel at the
pivot brackets. Tighten the screw on the driver side,
followed by the screw on the passenger side. Tighten
the screws to 7 N´m (60 in. lbs.).
(3) Install and tighten the screws that secure the
wiper module to the bottom of the cowl plenum
panel. Tighten the screw on the passenger side, fol-
lowed by the screw on the driver side. Tighten the
screws to 7 N´m (60 in. lbs.).
(4) Reconnect the left headlamp and dash wire
harness connector for the wiper motor to the motor
pigtail wire connector.
(5) Reinstall the cowl plenum cover/grille panel
over the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE - INSTALLATION).
(6) Reconnect the battery negative cable.
(7) Close and latch the hood.
(8) Reinstall both wiper arms onto the wiper piv-
ots. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARMS - INSTALLATION).
DRWIPERS/WASHERS 8R - 23
WIPER MODULE (Continued)

The wiper on/off relay cannot be adjusted or
repaired and, if faulty or damaged, the unit must be
replaced.
OPERATION
The wiper on/off relay is an electromechanical
switch that uses a low current input from the Front
Control Module (FCM) to control a high current out-
put to the wiper motor. The movable common feed
contact point is held against the fixed normally
closed contact 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 normally closed contact point, and
holds it against the fixed normally open contact
point. When the relay coil is de-energized, spring
pressure returns the movable contact point back
against the fixed normally closed contact point. A
resistor is connected in parallel with the relay coil in
the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as
the electromagnetic field of the relay coil collapses.
The wiper on/off relay terminals are connected to
the vehicle electrical system through a connector
receptacle in the Integrated Power Module (IPM).
The inputs and outputs of the wiper on/off relay
include:
²Common Feed Terminal- The common feed
terminal (30) is connected to the common feed termi-
nal of the wiper high/low relay at all times through
the wiper on/off relay output circuit.
²Coil Ground Terminal- The coil ground termi-
nal (85) is connected to a control output of the Front
Control Module (FCM) through a wiper on/off relay
control circuit. The FCM controls wiper motor opera-
tion by controlling a ground path through this cir-
cuit.
²Coil Battery Terminal- The coil battery ter-
minal (86) receives battery current at all times from
a fuse in the IPM through a fused ignition switch
output (run-acc) circuit.
²Normally Open Terminal- The normally open
terminal (87) receives battery current at all times
from a fuse in the IPM through a fused ignition
switch output (run-acc) circuit, and provides battery
current to the wiper on/off relay output circuit when-
ever the relay is energized.²Normally Closed Terminal- The normally
closed terminal (87A) is connected to ground at all
times through a take out of the left headlamp and
dash wire harness with an eyelet terminal connector
that is secured by a screw to the front end sheet
metal, and is connected to the wiper on/off relay out-
put circuit whenever the relay is de-energized.
The wiper on/off relay may be diagnosed using con-
ventional diagnostic tools and methods. However,
conventional diagnostic methods may not prove con-
clusive in the diagnosis of the instrument cluster, the
Front Control Module (FCM), or the electronic mes-
sage inputs to or outputs from the instrument cluster
and the FCM that control the operation of the wiper
on/off relay. The most reliable, efficient, and accurate
means to diagnose the wiper on/off relay, the instru-
ment cluster, the FCM, or the electronic message
inputs and outputs related to the wiper on/off relay
operation requires the use of a DRBIIItscan tool.
Refer to the appropriate diagnostic information.
DIAGNOSIS AND TESTING - WIPER ON/OFF
RELAY
The wiper on/off relay (Fig. 28) is located in the
Integrated Power Module (IPM) in the engine com-
partment near the battery. Refer to the appropriate
wiring information. The wiring 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.
Fig. 28 ISO Micro Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
DRWIPERS/WASHERS 8R - 25
WIPER ON/OFF RELAY (Continued)