2003 DODGE RAM Service Repair Manual

rear view mirror winter tires service reset change wheel fuel consumption auxiliary battery location

Page 689 of 2895

DODGE RAM 2003 Service Repair Manual However, conventional diagnostic methods may not
prove conclusive in the diagnosis of the instrument
cluster, the Front Control Module (FCM), or the elec-
tronic message inputs to or outputs from the

However, conventional diagnostic methods may not
prove conclusive in the diagnosis of the instrument
cluster, the Front Control Module (FCM), or the elec-
tronic message inputs to or outputs from the instru-
ment 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 instrument cluster, the FCM,
or the electronic message inputs and outputs related
to the washer pump/motor unit operation requires
the use of a DRBIIItscan tool. Refer to the appro-
priate 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 V-10 or diesel
engine) or left (V-10 or diesel engine only) headlamp
and dash wire harness 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 V-10 or diesel
engine) or left (V-10 or diesel engine only) headlamp
and dash wire harness 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.
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)

Page 690 of 2895

DODGE RAM 2003 Service Repair Manual WASHER RESERVOIR
DESCRIPTION
Except on models equipped with an optional V-10
or diesel engine, the molded plastic washer fluid res-
ervoir is mounted on the right rearward facing sur-
face of the cool

WASHER RESERVOIR
DESCRIPTION
Except on models equipped with an optional V-10
or diesel engine, the molded plastic washer fluid res-
ervoir is mounted on the right rearward facing sur-
face of the cooling module radiator shroud in the
engine compartment (Fig. 14). On models with the
V-10 or 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 compartment. The reservoir is a molded
unit constructed of a translucent plastic that allows
the washer fluid level to be inspected without remov-
ing the washer reservoir cap. The most visible com-
ponent of the washer reservoir is the filler cap unit,
which is secured to and hinges on a hook feature
that is integral 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 reservoiropening with an integral rubber gasket. The filler
cap is labeled with an International Control and Dis-
play 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
V-10 or 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 bottom 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
V-10 or 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 con-
tainer 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.
Fig. 14 Washer Reservoir - except V-10 & 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

Page 691 of 2895

DODGE RAM 2003 Service Repair Manual REMOVAL
REMOVAL - EXCEPT V-10 OR 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

REMOVAL
REMOVAL - EXCEPT V-10 OR 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
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 - V-10 OR 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).
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 - V-10 &
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)

Page 692 of 2895

DODGE RAM 2003 Service Repair Manual (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

(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.
INSTALLATION
INSTALLATION - EXCEPT V-10 OR 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 - V-10 OR 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.
Fig. 17 Washer Reservoir Remove/Install - V-10 &
Diesel Engine
1 - RESERVOIR WASHER HOSE
2 - RADIATOR SUPPORT
3 - SCREW (2)
4 - WASHER RESERVOIR
DRWIPERS/WASHERS 8R - 17
WASHER RESERVOIR (Continued)

Page 693 of 2895

DODGE RAM 2003 Service Repair Manual 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

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
(Fig. 18). These wiper arms feature an over-center
hinge that allows easy access to the windshield glass
for cleaning. The wiper arm has a die cast metal
pivot end with a large internally serrated socket for-
mation at one end. A key within the socket formation
indexes the wiper arm to a keyway in the pivot shaft
of the wiper module to provide wiper alignment, and
a spring-loaded latch on the underside of the wiper
arm pivot end locks the unit to the pivot shaft when
it is fully installed. The right and left wiper arms for
this model are not interchangeable, as the right
wiper arm is slightly longer than the left one.
The wide end of a tapered, stamped steel channel
hinges on and is secured with a hinge pin to the
blade end of the wiper arm pivot end. 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
engaged with a wire hook on the underside of the die
cast pivot end, while the other end of the spring is
hooked through the small hole in the steel strap. Theentire 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
proper wiper blade travel on the glass. The serrated
and keyed socket formation in the wiper arm pivot
end interlocks with the serrations and keyway on the
outer circumference of the wiper pivot shaft, provid-
ing positive engagement and alignment of this con-
nection. The latch positively locks the wiper arm to
the wiper pivot shaft when the arm is fully installed.
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) Lift the wiper arm to its over-center position to
hold the wiper blade off of the glass and relieve the
spring tension on the wiper arm to wiper pivot shaft
connection.
(2) Pull the latch on the pivot end of the wiper
arm outward (Fig. 19).
(3) Remove the wiper arm pivot end from the
wiper pivot shaft.
Fig. 18 Wiper Arm
1 - HOOK
2 - STRAP
3 - PIVOT END
4 - KEY
5-LATCH
6 - HINGE PIN
7 - TENSION SPRING
8 - CHANNEL
Fig. 19 Wiper Arm Remove/Install
1 - WIPER ARM PIVOT END
2-LATCH
8R - 18 WIPERS/WASHERSDR

Page 694 of 2895

DODGE RAM 2003 Service Repair Manual INSTALLATION
The right and left wiper arms are not interchange-
able. The right wiper arm is slightly longer than the
left. Be certain that each wiper arm is installed on
the proper wiper pivot.
(1) P

INSTALLATION
The right and left wiper arms are not interchange-
able. The right wiper arm is slightly longer than the
left. Be certain that each wiper arm is installed on
the proper wiper pivot.
(1) Place the wiper arm hinge in its over-center
position prior to attempting installation.
(2) The wiper arms are indexed to the wiper pivot
shafts with integral keys in the wiper arm pivot ends
and keyways in the wiper pivot shafts. Align the key
of the wiper arm to the keyway on the wiper pivot
shaft.
(3) Once the wiper blade is aligned, push the pivot
of the wiper arm down firmly and evenly over the
wiper pivot shaft until it is fully engaged. When the
wiper arm is fully engaged on the wiper pivot, the
spring-loaded latch (Fig. 19) will snap back into place
against the wiper arm pivot end.
(4) Gently lower the wiper arm until the wiper
blade is in position on the windshield glass.
WIPER BLADE
DESCRIPTION
Each wiper blade is secured by an integral latching
pivot block to the hook formation on the tip of each
wiper arm, and rests on the glass near the base of
the windshield when the wipers are not in operation
(Fig. 20). 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.
All models have two 60.00 centimeter (23.62 inch)
long wiper blades with non-replaceable rubber ele-
ments (squeegees). The wiper blades cannot be
adjusted or repaired. If faulty, worn, or damaged the
entire wiper blade unit must be replaced.
OPERATION
The wiper blades are moved back and forth across
the glass by the wiper arms when the wipers are
being operated. The wiper blade superstructure is
the flexible 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 that
may be encountered 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 ele-
ment is designed to be stiff enough to maintain an
even cleaning edge as it is drawn across the glass,
yet resilient enough to conform to the glass surface
and flip from one cleaning edge to the other each
time the wiper blade changes directions.
REMOVAL
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 to raise the wiper blade and
element off of the glass, until the wiper arm hinge is
in its over-center position.
(2) To remove the wiper blade from the wiper arm,
depress 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 formation on
the end of the arm (Fig. 21).
Fig. 20 Wiper Blade
1 - SUPERSTRUCTURE
2 - ELEMENT
3 - PIVOT BLOCK
4 - RELEASE TAB
5 - PIVOT PIN
6 - CLAWS
7 - FLEXOR
DRWIPERS/WASHERS 8R - 19
WIPER ARM (Continued)

Page 695 of 2895

DODGE RAM 2003 Service Repair Manual (3) Extract the hook formation on the tip of the
wiper arm through the opening in the wiper blade
superstructure just ahead of the wiper blade pivot
block/latch unit.
CAUTION: Do not allow the wiper a

(3) Extract the hook formation on the tip of the
wiper arm through the opening in the wiper blade
superstructure just 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.
(4) Gently lower the tip of the wiper arm onto the
glass.
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 position.
(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 integral
male 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.
Fig. 21 Wiper Blade Remove/Install
1 - SUPERSTRUCTURE
2 - WIPER ARM
3 - PIVOT BLOCK
4 - RELEASE TAB
5 - HOOK
6 - ELEMENT
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)

Page 696 of 2895

DODGE RAM 2003 Service Repair Manual 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 rela

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.
The wiper high/low relay can be diagnosed using
conventional 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
high/low relay. The most reliable, efficient, and accu-
rate means to diagnose the wiper high/low relay, the
instrument cluster, the FCM, or the electronic mes-
sage inputs and outputs related to the wiper high/low
relay operation requires the use of a DRBIIItscan
tool. Refer to the appropriate diagnostic information.
DIAGNOSIS AND TESTING - WIPER HIGH/LOW
RELAY
The wiper high/low relay (Fig. 23) 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.(1) Remove the wiper high/low relay from the IPM.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER HIGH/LOW 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 8 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, reinstall the relay and use a DRBIIIt
scan tool to perform further testing. Refer to the
appropriate diagnostic information.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the cover from the Integrated Power
Module (IPM) (Fig. 24).
(3) Remove the wiper high/low relay by grasping it
firmly and pulling it straight out from the receptacle
in the IPM.
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.
Fig. 23 ISO Micro Relay
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
DRWIPERS/WASHERS 8R - 21
WIPER HIGH/LOW RELAY (Continued)

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