2002 JEEP LIBERTY electric

²Rear Wiper Module- The rear wiper motor
output shaft is the only visible component of the rear
wiper module. The remainder of the module is con-
cealed within the tailgate below the rear flip-up glass
opening. The rear wiper module includes the module
bracket, the rear wiper motor, and the rear wiper
electronic control circuitry.
²Washer Pump/Motor- The reversible electric
washer pump/motor unit is located in a dedicated
hole on the lower outboard side of the washer reser-
voir, behind the right front wheel house splash
shield. This single reversible washer pump/motor
provides washer fluid to either the front or rear
washer system plumbing, depending upon the direc-
tion of the pump motor rotation. (Refer to 8 - ELEC-
TRICAL/FRONT WIPERS/WASHERS/WASHER
PUMP MOTOR - DESCRIPTION).
²Washer Reservoir- The washer reservoir is
concealed behind the right front wheel house splash
shield ahead of the right front wheel. The washer
reservoir filler neck is the only visible portion of the
reservoir, and it is accessed from the right front cor-
ner of the engine compartment. This single washer
reservoir is shared by both the front and rear washer
systems. (Refer to 8 - ELECTRICAL/FRONT WIP-
ERS/WASHERS/WASHER RESERVOIR - DESCRIP-
TION).
Hard wired circuitry connects the rear wiper and
washer system components to the electrical system of
the vehicle. These hard wired circuits are integral to
several wire harnesses, which are routed throughout
the vehicle and retained by many different methods.
These circuits may be connected to each other, to the
vehicle electrical system and to the rear wiper and
washer system components through the use of a com-
bination of soldered splices, splice block connectors,
and many different types of wire harness terminal
connectors and insulators. Refer to the appropriate
wiring information. The wiring information includes
wiring diagrams, proper wire and connector repair
procedures, further details on wire harness routing
and retention, as well as pin-out and location views
for the various wire harness connectors, splices and
grounds.
OPERATING MODES The components of the rear
wiper and washer system are designed to work in
concert to provide the following operating modes:
²Continuous Wipe Mode- The control ring on
the right (wiper) control stalk of the multi-function
switch has an On position. When selected, this
switch position will cause the rear wiper motor to
operate in a continuous manner at a fixed wipe cycle
speed.
²Intermittent Wipe Mode- The control ring on
the right (wiper) control stalk of the multi-function
switch has a Delay position. When selected, thisswitch position will cause the rear wiper motor to
operate in an intermittent manner at a fixed interval
wipe cycle speed.
²Washer Mode- The control ring on the right
(wiper) control stalk of the multi-function switch has
two momentary Wash positions, one at the end of
each direction of control ring rotation. When the con-
trol ring is rotated to the downward (counterclock-
wise) Wash position, the rear washer system will
dispense washer fluid onto the flip-up glass and the
rear wiper motor will operate in a continuous mode
for as long as the switch is held closed, then provide
several additional wipe cycles after the washer
switch is released (wipe-after-wash mode). When the
control ring is rotated to the upward (clockwise)
Wash position, the rear washer system will dispense
washer fluid onto the flip-up glass and the rear wiper
motor will operate in a continuous mode for as long
as the switch is held closed, then return to fixed wipe
mode operation after the washer switch is released.
²Wipe-After-Wash Mode- The control ring on
the right (wiper) control stalk of the multi-function
switch has two momentary Wash positions, one at
the end of each direction of control ring rotation.
When the control ring is rotated to the downward
(counterclockwise) Wash position, the rear washer
system will dispense washer fluid onto the flip-up
glass and the rear wiper motor will operate in a con-
tinuous mode for as long as the switch is held closed,
then provide several additional wipe cycles after the
washer switch is released.
OPERATION
The rear wiper and washer system is designed to
provide the vehicle operator with a convenient, safe,
and reliable means of maintaining visibility through
the rear flip-up glass. The various components of this
system are designed to convert electrical energy pro-
duced by the vehicle electrical system into the
mechanical action of the wiper blade to wipe the out-
side surface of the glass, as well as into the hydraulic
action of the washer system to apply washer fluid
stored in an on-board reservoir to the area of the
glass to be wiped. When combined, these components
provide the means to effectively maintain clear visi-
bility for the vehicle operator by removing excess
accumulations of rain, snow, bugs, mud, or other
minor debris from the swing gate flip up glass sur-
face that might be encountered while driving the
vehicle under numerous types of inclement operating
conditions.
The vehicle operator initiates all rear wiper and
washer system functions with the right (wiper) con-
trol stalk of the multi-function switch that extends
from the right side of the steering column, just below
the steering wheel. Rotating the control ring on the
KJREAR WIPERS/WASHERS 8R - 29
REAR WIPERS/WASHERS (Continued)

control stalk to a detent position selects the Off,
Delay, or On rear wiper system operating modes.
Rotating the control ring on the control stalk to
either of two Wash positions actuates the momentary
rear washer system switch. The multi-function
switch provides hard wired outputs to the rear wiper
module and the washer pump/motor unit for all rear
wiper and washer system functions.
The rear wiper and washer system will only oper-
ate when the ignition switch is in the Accessory or
On positions, and the rear flip-up glass and tailgate
ajar switches are closed. Battery current is directed
from a fuse in the Junction Block (JB) to the multi-
function switch through a fused ignition switch out-
put (run-acc) circuit. The internal circuitry of the
right (wiper) control stalk of the multi-function
switch then provides battery current signals through
a rear wiper on driver circuit and a rear wiper inter-
mittent driver circuit to the rear wiper module and
to the Body Control Module (BCM). The BCM uses
these rear wiper system inputs as a signal to lock the
rear flip-up glass and the tailgate to prevent the rear
flip-up glass or tailgate from being opened for as long
as the rear wiper is operating. The multi-function
switch circuitry also uses this battery current and a
ground circuit input to directly control the operation
and direction of the reversible electric washer pump/
motor unit.
A separate fuse in the JB provides battery current
to the electronic control circuitry of the rear wiper
module through a fused B(+) circuit. The rear wiper
module uses this fused B(+) input to park the rear
wiper blade off of the rear flip-up glass if the ignition
switch is turned to the Off position while the rear
wiper is operating, or if the ignition switch is turned
to the Off position before the rear wiper blade has
parked. However, if the ignition switch is turned to
the Off position while the rear wiper is operating,
then turned back On, the rear wiper switch must be
cycled to the Off position and back to the On or
Delay position before the rear wiper will operate
again. In addition, the rear wiper module receives an
input from the rear flip-up glass ajar switch on a
flip-up glass ajar switch sense circuit, which prevents
the rear wiper from operating when the flip-up glass
is not closed or fully latched.
The hard wired circuits and components of the rear
wiper and washer system may be diagnosed and
tested using conventional diagnostic tools and proce-
dures. Following are paragraphs that briefly describe
the operation of each of the rear wiper and washer
system operating modes.
CONTINUOUS WIPE MODE When the On posi-
tion of the control ring on the right (wiper) control
stalk of the multi-function switch is selected, the
multi-function switch circuitry directs a battery cur-rent signal to the rear wiper module through the
rear wiper on driver circuit, causing the rear wiper to
cycle continuously at a fixed speed.
INTERMITTENT WIPE MODE When the Delay
position of the control ring on the right (wiper) con-
trol stalk of the multi-function switch is selected, the
multi-function switch circuitry directs a battery cur-
rent signal to the rear wiper module through the
rear wiper intermittent driver circuit, causing the
rear wiper to cycle intermittently at a fixed delay
interval.
WASH MODE When the momentary Wash (after
On) position of the control ring on the right (wiper)
control stalk of the multi-function switch is selected,
the multi-function switch circuitry directs both bat-
tery current and ground to the washer pump/motor
unit, and a battery current signal to be provided to
the rear wiper module through the rear wiper on
driver circuit. This will cause the washer pump/mo-
tor unit to be energized and the rear wiper to cycle
continuously at a fixed speed for as long as the rear
Wash switch is held closed.
WIPE-AFTER-WASH MODE When the momentary
Wash (before Off) position of the control ring on the
right (wiper) control stalk of the multi-function
switch is selected, the multi-function switch circuitry
directs both battery current and ground to the
washer pump/motor unit, and a battery current sig-
nal to be provided to the rear wiper module through
the rear wiper on driver circuit. This will cause the
washer pump/motor unit to be energized and the rear
wiper to cycle continuously at a fixed speed for as
long as the rear Wash switch is held closed. When
the control ring is released to the Off position, the
washer pump/motor is de-energized, but the circuitry
within the rear wiper module will provide several
additional wipe cycles to complete the wipe-after-
wash mode cycle.
DIAGNOSIS AND TESTING - REAR WIPER &
WASHER SYSTEM
REAR WIPER SYSTEM
The diagnosis found here addresses an electrically
inoperative rear wiper system. If the rear wiper
motor operates, but the wiper does not move on the
rear flip-up glass, inspect the mechanical connection
between the rear wiper arm and the rear wiper
motor output shaft. If OK, replace the faulty rear
wiper module. If the wiper operates, but chatters,
lifts, or does not clear the glass, clean and inspect
the rear wiper system components as required. (Refer
to 8 - ELECTRICAL/REAR WIPERS/WASHERS -
INSPECTION) and (Refer to 8 - ELECTRICAL/
REAR WIPERS/WASHERS - CLEANING). Refer to
the appropriate wiring information. The wiring infor-
8R - 30 REAR WIPERS/WASHERSKJ
REAR WIPERS/WASHERS (Continued)

rear wiper on driver circuit between the rear wiper
module and the multi-function switch as required.
REAR WASHER SYSTEM
The diagnosis found here addresses an electrically
inoperative rear washer system. If the washer pump/
motor operates, but no washer fluid is emitted from
the rear washer nozzle, be certain to check the fluid
level in the reservoir. Also inspect the rear washer
system components as required. (Refer to 8 - ELEC-
TRICAL/REAR WIPERS/WASHERS - INSPECTION).
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.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, SEAT BELT TENSIONER,
SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. DISCON-
NECT AND ISOLATE THE BATTERY NEGATIVE
(GROUND) CABLE, THEN WAIT TWO MINUTES FOR
THE SYSTEM CAPACITOR TO DISCHARGE BEFORE
PERFORMING FURTHER DIAGNOSIS OR SERVICE.
THIS IS THE ONLY SURE WAY TO DISABLE THE
SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO
TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Turn the ignition switch to the On position.
Turn the control ring on the right (wiper) control
stalk of the multi-function switch to the On position.
Check whether the rear wiper system is operating. If
OK, go to Step 2. If not OK, test and repair the rear
wiper system before continuing with these tests.
Refer to REAR WIPER SYSTEM .
(2) Pull the right (wiper) control stalk of the multi-
function switch toward the steering wheel. Check
whether the front washer system is operating. If OK,
test the multi-function switch. (Refer to 8 - ELEC-
TRICAL/LAMPS/LIGHTING - EXTERIOR/MULTI-
FUNCTION SWITCH - DIAGNOSIS AND
TESTING). If the multi-function switch tests OK, go
to Step 3. If the multi-function switch does not test
OK, replace the faulty switch.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the headlamp and dash wire harness con-
nector for the washer pump/motor unit from the
pump/motor unit connector receptacle. Check for con-
tinuity between the washer pump driver circuit cav-ity of the headlamp and dash wire harness connector
for the washer pump/motor unit and a good ground.
There should be no continuity. If OK, go to Step 4. If
not OK, repair the shorted washer pump driver cir-
cuit between the washer pump/motor unit and the
multi-function switch as required.
(4) Check for continuity between the washer pump
driver circuit cavities of the headlamp and dash wire
harness connector for the washer pump/motor unit
and the instrument panel wire harness connector for
the multi-function switch (Connector C-2). There
should be continuity. If OK, go to Step 5. If not OK,
repair the open washer pump driver circuit between
the washer pump/motor unit and the multi-function
switch as required.
(5) Check for continuity between the washer pump
sense circuit cavity of the headlamp and dash wire
harness connector for the washer pump/motor unit
and a good ground. There should be no continuity. If
OK, go to Step 6. If not OK, repair the shorted
washer pump sense circuit between the washer
pump/motor unit and the multi-function switch as
required.
(6) Check for continuity between the washer pump
sense circuit cavities of the headlamp and dash wire
harness connector for the washer pump/motor unit
and the instrument panel wire harness connector for
the multi-function switch (Connector C-2). There
should be continuity. If OK, replace the faulty washer
pump/motor unit. If not OK, repair the open washer
pump sense circuit between the washer pump/motor
unit and the multi-function switch as required.
CLEANING - REAR WIPER & WASHER SYSTEM
REAR WIPER SYSTEM
The squeegee of a wiper blade exposed to the ele-
ments for a long time tends to lose its wiping effec-
tiveness. Periodic cleaning of the squeegee is
suggested to remove any deposits of salt or road film.
The wiper blade, arm, and rear flip-up glass should
only be cleaned using a sponge or soft cloth and
windshield washer fluid, a mild detergent, or a non-
abrasive cleaner. If the wiper blade continues to
leave streaks, smears, hazing, or beading on the
glass after thorough cleaning of the squeegees and
the glass, the entire wiper blade assembly must be
replaced.
CAUTION: Protect the rubber squeegee of the wiper
blade from any petroleum-based cleaners, solvents,
or contaminants. These products can rapidly deteri-
orate the rubber squeegee.
8R - 32 REAR WIPERS/WASHERSKJ
REAR WIPERS/WASHERS (Continued)

REAR WASHER SYSTEM
If the washer system is contaminated with foreign
material, drain the washer reservoir by removing the
washer pump/motor from the reservoir. Clean foreign
material from the inside of the washer pump/motor
inlet filter screen and the washer reservoir using
clean washer fluid, a mild detergent, or a non-abra-
sive cleaner. Flush foreign material from the washer
system plumbing by first disconnecting the washer
hose from the washer nozzle, then running the
washer pump/motor to run clean washer fluid or
water through the system. A plugged or restricted
washer nozzle should be carefully back-flushed using
compressed air. If the washer nozzle obstruction can-
not be cleared, replace the washer nozzle.
CAUTION: Never introduce petroleum-based clean-
ers, solvents, or contaminants into the washer sys-
tem. These products can rapidly deteriorate the
rubber seals and hoses of the washer system, as
well as the rubber squeegee of the wiper blade.
CAUTION: Never use compressed air to flush the
washer system plumbing. Compressed air pres-
sures are too great for the washer system plumbing
components and will result in further system dam-
age. Never use sharp instruments to clear a
plugged washer nozzle or damage to the nozzle ori-
fice and improper nozzle spray patterns will result.
INSPECTION - REAR WIPER & WASHER
SYSTEM
REAR WIPER SYSTEM
The rear wiper blade and wiper arm should be
inspected periodically, not just when wiper perfor-
mance problems are experienced. This inspection
should include the following points:
(1) Inspect the wiper arm for any indications of
damage, or contamination. If the wiper arm is con-
taminated with any foreign material, clean as
required. (Refer to 8 - ELECTRICAL/REAR WIPERS/
WASHERS - CLEANING). If a wiper arm is damaged
or corrosion is evident, replace the wiper arm with a
new unit. Do not attempt to repair a wiper arm that
is damaged or corroded.
(2) Carefully lift the wiper arm off of the park
ramp. Note the action of the wiper arm hinge. The
wiper arm should pivot freely at the hinge, but with
no lateral looseness evident. If there is any binding
evident in the wiper arm hinge, or there is evident
lateral play in the wiper arm hinge, replace the
wiper arm.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.
(3) Once proper hinge action of the wiper arm is
confirmed, check the hinge for proper spring tension.
The spring tension of the wiper arm should be suffi-
cient to cause the rubber squeegee to conform to the
curvature of the glass. Replace a wiper arm if it has
low or no spring tension.
(4) Inspect the wiper blade and squeegee for any
indications of damage, contamination, or rubber dete-
rioration (Fig. 2). If the wiper blade or squeegee is
contaminated with any foreign material, clean them
and the glass as required. (Refer to 8 - ELECTRI-
CAL/REAR WIPERS/WASHERS - CLEANING). If
after cleaning the wiper blade and the glass, the
wiper blade fails to clear the glass without smearing,
streaking, chattering, hazing, or beading, replace the
wiper blade. Also, if a wiper blade is damaged or if
the squeegee rubber is damaged or deteriorated,
replace the wiper blade with a new unit. Do not
attempt to repair a wiper blade that is damaged.
Fig. 2 Wiper Blade Inspection
1 - WORN OR UNEVEN EDGES
2 - ROAD FILM OR FOREIGN MATERIAL DEPOSITS
3 - HARD, BRITTLE, OR CRACKED
4 - DEFORMED OR FATIGUED
5 - SPLIT
6 - DAMAGED SUPPORT COMPONENTS
KJREAR WIPERS/WASHERS 8R - 33
REAR WIPERS/WASHERS (Continued)

REAR WASHER SYSTEM
The washer system components should be
inspected periodically, not just when washer perfor-
mance problems are experienced. This inspection
should include the following points:
(1) Check for ice or other foreign material in the
washer reservoir. If contaminated, clean and flush
the washer system. (Refer to 8 - ELECTRICAL/
REAR WIPERS/WASHERS - CLEANING).
(2) Inspect the washer plumbing for pinched, leak-
ing, deteriorated, or incorrectly routed hoses and
damaged or disconnected hose fittings. Replace dam-
aged or deteriorated hoses and hose fittings. Leaking
washer hoses can sometimes be repaired by cutting
the hose at the leak and splicing it back together
using an in-line connector fitting. Similarly, sections
of deteriorated hose can be cut out and replaced by
splicing in new sections of hose using in-line connec-
tor fittings. Whenever routing a washer hose or a
wire harness containing a washer hose, it must be
routed away from hot, sharp, or moving parts. Also,
sharp bends that might pinch the washer hose must
be avoided.
REAR CHECK VALVE
DESCRIPTION
A rear washer system check valve is standard
equipment on this model (Fig. 3). The rear check
valve is located in the washer plumbing between the
rear roof header and the roof outer panel near the
rear washer nozzle. The rear check valve consists of
a molded plastic body with a round center sectionand barbed hose nipples at each end. An arrow for-
mation molded into the center section of the valve
body indicates the direction of flow through the
valve. The rear check valve cannot be adjusted or
repaired and, if faulty or damaged, it must be
replaced.
OPERATION
The rear check valve prevents washer fluid from
draining out of the rear washer supply hoses back to
the washer reservoir. This drain-back would result in
a lengthy delay from when the rear washer switch is
actuated until washer fluid was dispensed through
the rear washer nozzle, because the washer pump
would have to refill the rear washer plumbing from
the reservoir to the nozzle. The check valve also pre-
vents washer fluid from siphoning through the rear
washer nozzle after the rear washer system is turned
Off.
Within the check valve body, a small check valve is
held in place against a seat by a small coiled spring
to restrict flow through the unit until the valve is
unseated by a predetermined inlet fluid pressure.
When the washer pump pressurizes and pumps
washer fluid from the reservoir through the rear
washer plumbing, the fluid pressure overrides the
spring pressure applied to the check ball within the
valve and unseats the valve, allowing washer fluid to
flow toward the rear washer nozzle. When the
washer pump stops operating, spring pressure seats
the check valve and fluid flow in either direction
within the rear washer plumbing is prevented.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the Center High Mounted Stop Lamp
(CHMSL) unit from the rear of the roof panel. (Refer
to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERI-
OR/CENTER HIGH MOUNTED STOP LAMP UNIT
- REMOVAL).
WARNING: THE EDGES OF THE SHEET METAL
AROUND THE CENTER HIGH MOUNTED STOP
LAMP MOUNTING HOLE IN THE ROOF PANEL.
TAKE THE PROPER PRECAUTIONS TO AVOID PER-
SONAL INJURY.
(3) Reach through the CHMSL unit mounting hole
in the rear of the roof panel to access and disconnect
the rear washer hose at the barbed nipple of the rear
washer nozzle (Fig. 4).
(4) Pull the rear washer hose through the CHMSL
unit mounting hole far enough to access and discon-
nect the headliner washer hose from the barbed nip-
ple of the rear check valve.
Fig. 3 Rear Check Valve
1 - INLET NIPPLE
2 - REAR CHECK VALVE
3 - OUTLET NIPPLE
4 - FLOW DIRECTION ARROW
8R - 34 REAR WIPERS/WASHERSKJ
REAR WIPERS/WASHERS (Continued)

(5) Remove the rear check valve and rear washer
nozzle hose as a unit through the CHMSL mounting
hole.
(6) Disconnect the rear washer nozzle hose from
the barbed nipple of the rear check valve.
INSTALLATION
(1) Reconnect the rear washer nozzle hose to the
barbed nipple of the rear check valve. Be certain that
the flow direction arrow molded into the rear check
valve body is oriented towards the rear washer noz-
zle hose.
WARNING: THE EDGES OF THE SHEET METAL
AROUND THE CENTER HIGH MOUNTED STOP
LAMP MOUNTING HOLE IN THE ROOF PANEL.
TAKE THE PROPER PRECAUTIONS TO AVOID PER-
SONAL INJURY.
(2) Reach through the CHMSL unit mounting hole
in the rear of the roof panel to access and pull the
headliner washer hose into the Center High Mounted
Stop Lamp (CHMSL) unit mounting hole (Fig. 4).
(3) Reconnect the headliner washer hose to the
barbed nipple of the rear check valve.
(4) Reach through the CHMSL unit mounting hole
in the rear of the roof panel to access and reconnect
the rear washer nozzle hose to the barbed nipple of
the rear washer nozzle.
(5) Reinstall the CHMSL unit to the rear of the
roof panel. (Refer to 8 - ELECTRICAL/LAMPS/
LIGHTING - EXTERIOR/CENTER HIGH
MOUNTED STOP LAMP UNIT - INSTALLATION).
(6) Reconnect the battery negative cable.
REAR WASHER HOSES/TUBES
DESCRIPTION
The rear washer plumbing consists of small diam-
eter rubber hose routed from the barbed outlet nipple
of the reversible electric washer pump/motor unit on
the washer reservoir through a trough molded into
the reservoir rearward of the washer pump up to the
top of the reservoir. Near the base of the reservoir
filler neck an in-line plastic fitting connects the res-
ervoir rear washer hose to the engine compartment
rear washer hose, which is routed through the reser-
voir filler neck opening in the front extension of the
right front fender wheel house panel in to the engine
compartment. The engine compartment rear washer
hose is routed side by side with the front washer
hose along the top of the right front fender wheel
house to the dash panel. Molded plastic routing clips
secure the hoses to the headlamp and dash wire har-
ness in the engine compartment.
The engine compartment rear washer hose is con-
nected to the headliner washer hose near the right
side of the dash panel with a molded plastic in-line
fitting (Fig. 5). The headliner hose has a rubber
grommet that allows it to pass through the dash
panel from the passenger compartment into the
engine compartment. The headliner hose is routed
below the instrument panel in the passenger com-
partment near the right cowl side inner panel. The
hose is routed up the right A-pillar to the headliner.
Mounting clips secure the hose to the A-pillar. The
Fig. 4 Rear Check Valve Remove/Install
1 - WASHER NOZZLE HOSE
2 - REAR CHECK VALVE
3 - HEADLINER HOSE
4 - ROOF PANEL
5 - NEEDLE NOSE PLIERS
6 - CHMSL MOUNTING HOLE
Fig. 5 Rear Washer Headliner Hose
1 - COWL SIDE INNER PANEL
2 - A-PILLAR
3 - HEADLINER HOSE
4 - CLIP (3)
5 - GROMMET
6 - DASH PANEL
KJREAR WIPERS/WASHERS 8R - 35
REAR CHECK VALVE (Continued)

(3) Raise the pivot block latch release tab until it
is perpendicular to the rear wiper blade superstruc-
ture (Fig. 14).
(4) Insert the hook formation on the tip of the
wiper arm through the window in the wiper blade
pivot block/latch unit.
(5) Slide the wiper blade pivot block/latch up into
the hook formation on the tip of the wiper arm until
the hook is firmly seated against the pivot block.
(6) Press the pivot block latch release tab down-
ward until it snaps into its locked position over the
top of the wiper arm.
(7) Gently lower the wiper arm and place the arm
support in the tailgate park ramp.
REAR WIPER MOTOR
DESCRIPTION
The rear wiper motor is concealed within the tail-
gate, below the rear flip-up glass opening and behind
the tailgate inner trim panel. The end of the motor
output shaft that protrudes through the tailgate
outer panel to drive the rear wiper arm and blade is
the only visible component of the rear wiper motor
(Fig. 15). A rubber gasket, a bezel, and a nut secure
and seal the motor output shaft to the tailgate outer
panel. A molded plastic nut cover snaps onto the
bezel to conceal the nut and improve appearance. An
integral connector receptacle connects the rear wipermotor to the vehicle electrical system through a ded-
icated take out and connector of the tailgate wire
harness. The rear wiper motor consists of the follow-
ing major components:
²Bracket- The rear wiper motor bracket consists
of a stamped steel mounting plate for the wiper
motor that is secured with screws through two rub-
ber insulators to the tailgate inner panel.
²Rear Wiper Module- The rear wiper motor
electronic controls are concealed beneath a molded
plastic cover and includes the rear wiper system elec-
tronic logic and rear wiper motor electronic controls.
²Motor- The permanent magnet rear wiper
motor is secured with screws to the rear wiper motor
bracket. The wiper motor includes an integral trans-
mission, and the motor output shaft.
The rear wiper motor cannot be adjusted or
repaired. If any component of the motor is faulty or
damaged, the entire rear wiper motor unit must be
replaced. The motor output shaft gasket, bezel, nut,
and nut cover are available for service replacement.
OPERATION
The rear wiper motor receives non-switched bat-
tery current through a fuse in the Junction Block
(JB) on a fused B(+) circuit and is connected to
ground at all times. The rear wiper motor operation
is controlled by the vehicle operator through battery
current signal inputs received by the rear wiper
motor electronic control module from the rear wiper
switch circuitry that is integral to the right (wiper)
control stalk of the multi-function switch on the
steering column. The module also receives an exter-
nal control input from the flip-up glass ajar switch
sense circuit. If the rear wiper module senses that
the flip-up glass is ajar, it will not allow the rear
wiper motor to operate.
The rear wiper module electronic control logic uses
these inputs, its internal inputs, and its program-
ming to provide a continuous wipe mode, an inter-
mittent wipe mode, a wipe-after-wash mode, and off-
the-glass wiper blade parking. The wiper blade
cycling is controlled by the internal electronic con-
trols of the module. The module controls current flow
to the wiper motor brushes and provides an elec-
tronic speed control that speeds the wiper blade near
the center of the glass, but slows the wiper blade
during directional reversals at each end of the wipe
pattern and during wiper blade off-the-glass parking
for quieter operation. The wiper motor transmission
converts the rotary output of the wiper motor to the
back and forth wiping motion of the rear wiper arm
and blade on the rear flip-up glass.
Fig. 15 Rear Wiper Motor
1 - SCREW (2)
2 - INSULATOR (2)
3 - BRACKET
4 - OUTPUT SHAFT
5 - SEAL
6 - CONNECTOR RECEPTACLE
7 - COVER
8 - MOTOR
KJREAR WIPERS/WASHERS 8R - 41
REAR WIPER BLADE (Continued)

REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the rear wiper arm from the rear
wiper motor output shaft. (Refer to 8 - ELECTRI-
CAL/REAR WIPERS/WASHERS/REAR WIPER ARM
- REMOVAL).
(3) Using a small thin-bladed tool, gently pry at
the notch in the base of the rear wiper motor output
shaft bezel to unsnap the nut cover from the bezel
(Fig. 16).Be certain to take proper precautions
to protect the outer tailgate panel and its paint
finish from damage during this procedure.
(4) Remove the nut that secures the rear wiper
motor output shaft to the outer swing gate panel
(Fig. 16).
(5) Remove the bezel and gasket from the rear
wiper motor output shaft.
(6) Remove the trim panel from the tailgate inner
panel. (Refer to 23 - BODY/SWING GATE/TRIM
PANEL - REMOVAL).
(7) Disconnect the tailgate wire harness connector
for the flip-up glass ajar switch from the flip-up glass
latch connector receptacle.
(8) Disconnect the tailgate wire harness connector
for the rear wiper motor from the motor connector
receptacle (Fig. 17).
(9) Loosen the two screws that secure the rear
wiper motor mounting bracket to the top of the tail-
gate inner panel.
(10) Slide the rear wiper motor and mounting
bracket back far enough to disengage the two mount-ing screws from the keyed slots in the top of the tail-
gate inner panel.
(11) Remove the rear wiper motor and mounting
bracket from the tailgate as a unit.
INSTALLATION
(1) Position the rear wiper motor and bracket into
the tailgate as a unit (Fig. 17).
(2) Insert the rear wiper motor output shaft
through the hole in the tailgate outer panel and
engage the two mounting screws into the keyed slots
in the top of tailgate inner panel.
(3) From the outside of the tailgate, center the
rear wiper motor output shaft in the tailgate outer
panel clearance hole and install the gasket and bezel
over the centered shaft (Fig. 16).
(4) Install and tighten the nut that secures the
rear wiper motor output shaft to the outer tailgate
panel. Tighten the nut to 5 N´m (43 in. lbs.).
(5) From the inside of the tailgate, tighten the two
screws that secure the rear wiper motor mounting
bracket to the top of the tailgate inner panel. Tighten
the screws to 6 N´m (57 in. lbs.).
(6) Reconnect the tailgate wire harness connector
for the rear wiper motor to the motor connector
receptacle.
Fig. 16 Rear Wiper Motor Output Shaft Nut
Remove/Install
1 - BEZEL AND GASKET
2 - OUTPUT SHAFT
3 - TAILGATE OUTER PANEL
4 - NUT
5 - NUT COVER
Fig. 17 Rear Wiper Motor Remove/Install
1 - KEYED SLOT (2)
2 - SWING GATE INNER PANEL
3 - SCREW (2)
4 - REAR WIPER MOTOR ELECTRICAL CONNECTOR
5 - REAR WIPER MOTOR
8R - 42 REAR WIPERS/WASHERSKJ
REAR WIPER MOTOR (Continued)