2002 JEEP GRAND CHEROKEE fuse panel fuse 23

PASSENGER HEATED SEAT CUSHION (PREMIUM I/III)-4WAY
CAV CIRCUIT FUNCTION
1 P130 16DG/WT PASSENGER SEAT HEATER B(+) DRIVER
2 P88 16BK/BR HEATED SEAT DRIVER
3 P86 20DG/YL PASSENGER SEAT TEMPERATURE SENSOR INPUT
4 P29 20BR/WT SEAT SENSOR 5 VOLT SUPPLY
PASSENGER HEATED SEAT SWITCH - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 P134 20TN/LG PASSENGER SEAT HEATER SWITCH MUX
2 E2 20OR PANEL LAMPS DRIVER
3 F22 20WT/PK FUSED IGNITION SWITCH OUTPUT (RUN)
4- -
5 Z300 20BK GROUND
6 P132 20OR/BK SEAT HEATER SWITCH SENSOR GROUND
PASSENGER LUMBAR MOTOR (MIDLINE/PREMIUM) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 P105 16LG/DG LUMBAR FORWARD SWITCH SENSE
2 P104 16YL/RD LUMBAR REARWARD SWITCH SENSE
PASSENGER LUMBAR SWITCH (MIDLINE/PREMIUM) - WHITE 6 WAY
CAV CIRCUIT FUNCTION
1- -
2 Z1 16BK GROUND
3 P104 16YL/RD (RHD) LUMBAR REARWARD SWITCH SENSE
3 P105 16LG/DB (LHD) LUMBAR FORWARD SWITCH SENSE
4 P105 16LG/DB (RHD) LUMBAR FORWARD SWITCH SENSE
4 P104 16YL/RD (LHD) LUMBAR REARWARD SWITCH SENSE
5 Z1 16BK GROUND
6 F37 16RD/LB FUSED B(+)
8W - 80 - 104 8W-80 CONNECTOR PIN-OUTWJ

PASSENGER SIDE IMPACT SENSOR - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1- -
2- -
3 R134 20LB/BR PASSENGER SIDE IMPACT SENSOR GROUND
4 R132 20LG/VT PASSENGER SIDE IMPACT SENSOR SIGNAL
POWER AMPLIFIER C1 (PREMIUM RADIO) - WHITE 18 WAY
CAV CIRCUIT FUNCTION
1 D25 18YL/VT PCI BUS
2 F60 16RD/WT FUSED B(+)
3 Z9 16BK GROUND
4- -
5 X58 18DB/OR RIGHT REAR SPEAKER (-)
6 X57 18DG/WT LEFT REAR SPEAKER (-)
7 X56 18DB/PK RIGHT FRONT SPEAKER (-)
8 X55 18BR/RD LEFT FRONT SPEAKER (-)
9- -
10 F60 16RD/WT FUSED B(+)
11 Z9 16BK GROUND
12 - -
13 X64 18BR/WT ENABLE SIGNAL TO AMPLIFIER
14 - -
15 X52 18DB/WT RIGHT REAR SPEAKER (+)
16 X51 18WT/DG LEFT REAR SPEAKER (+)
17 X54 18VT RIGHT FRONT SPEAKER (+)
18 X53 18DG/OR LEFT FRONT SPEAKER (+)
POWER AMPLIFIER C2 (PREMIUM RADIO) - WHITE 12 WAY
CAV CIRCUIT FUNCTION
1 X90 18WT/VT RIGHT REAR DOOR SPEAKER (+)
2 X92 18TN/DG RIGHT REAR DOOR SPEAKER (-)
3 X85 18LG/DG LEFT FRONT DOOR SPEAKER (-)
4 X83 18YL/RD LEFT INSTRUMENT PANEL SPEAKER (+)
5 X84 18OR/GY RIGHT INSTRUMENT PANEL SPEAKER (-)
6 X93 18DG/WT LEFT REAR DOOR SPEAKER (+)
7 X91 18WT/DG LEFT REAR DOOR SPEAKER (-)
8 X87 18LG/RD LEFT FRONT DOOR SPEAKER (+)
9 X80 18LB/BK RIGHT FRONT DOOR SPEAKER (-)
10 X82 18LB/RD RIGHT FRONT DOOR SPEAKER (+)
11 X81 18YL/BK LEFT INSTRUMENT PANEL SPEAKER (-)
12 X86 18OR/RD RIGHT INSTRUMENT PANEL SPEAKER (+)
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 107

RADIATOR FAN RELAY - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 Z1 20BK GROUND
2 C24 20DB/PK RADIATOR FAN RELAY CONTROL
3 C23 12DG RADIATOR FAN RELAY OUTPUT
4 A16 12GY FUSED B(+)
RADIO C1 - GRAY 22 WAY
CAV CIRCUIT FUNCTION
1 F60 16RD/WT FUSED B(+)
2 X12 16WT/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
3 E2 20OR PANEL LAMPS DRIVER
4- -
5- -
6- -
7 X54 18VT RIGHT FRONT SPEAKER (+)
8 X56 18DB/PK RIGHT FRONT SPEAKER (-)
9 X55 18BR/RD LEFT FRONT SPEAKER (-)
10 X53 18DG/OR LEFT FRONT SPEAKER (+)
11 Z9 16BK GROUND
12 F60 16RD/WT FUSED B(+)
13 X64 18BR/WT ENABLE SIGNAL TO AMPLIFIER
14 D25 20YL/VT/DB PCI BUS
15 - -
16 - -
17 - -
18 X51 18WT/DG LEFT REAR SPEAKER (+)
19 X57 18DG/WT LEFT REAR SPEAKER (-)
20 X58 18DB/OR RIGHT REAR SPEAKER (-)
21 X52 18DB/WT RIGHT REAR SPEAKER (+)
22 Z9 16BK GROUND
RADIO C2 - GRAY 10 WAY
CAV CIRCUIT FUNCTION
1 X40 20WT/RD AUDIO OUT RIGHT
2 Z4 20WT/BK GROUND
3 Z5 20BK/LB SHIELD
4- -
5 X112 20RD IGNITION SWITCH OUTPUT (RUN-ACC)
6 X41 20WT/DG AUDIO OUT LEFT
7 Z17 20BK GROUND
8- -
9- -
10 X160 20YL FUSED B(+)
WJ8W-80 CONNECTOR PIN-OUT 8W - 80 - 111

RIGHT HIGH BEAM HEADLAMP - BLACK 2 WAY
CAV CIRCUIT FUNCTION
A Z1 18BK GROUND
B L34 18RD/OR FUSED RIGHT HIGH BEAM OUTPUT
RIGHT INSTRUMENT PANEL SPEAKER - WHITE 2 WAY
CAV CIRCUIT FUNCTION
1 X86 18OR/RD RIGHT INSTRUMENT PANEL SPEAKER (+)
2 X84 18OR/BK RIGHT INSTRUMENT PANEL SPEAKER (-)
RIGHT LIFTGATE AJAR SWITCH - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 Z1 20BK GROUND
2 G78 20TN/BK LIFTGATE AJAR SWITCH SENSE
RIGHT LOW BEAM HEADLAMP - GRAY 2 WAY
CAV CIRCUIT FUNCTION
A Z1 18BK GROUND
B L44 18VT/RD FUSED RIGHT LOW BEAM OUTPUT
RIGHT MULTI-FUNCTION SWITCH - WHITE 10 WAY
CAV CIRCUIT FUNCTION
1 V23 20BR/PK FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
2 V20 18BK/WT REAR WASHER PUMP MOTOR CONTROL
3 V10 20BR WASHER PUMP SWITCH SENSE
4- -
5 V13 18BR/LG REAR WIPER MOTOR CONTROL
6 V22 18BR/YL REAR WIPER MOTOR DELAY CONTROL
7 V9 20WT/BK WINDSHIELD WIPER SWITCH RETURN
8 V52 20DG/RD WINDSHIELD WIPER SWITCH MUX
9 V48 20RD/GY WIPER HIGH CONTROL
10 - -
8W - 80 - 116 8W-80 CONNECTOR PIN-OUTWJ

SHIFTER ASSEMBLY (GAS) - WHITE 6 WAY
CAV CIRCUIT FUNCTION
1 E2 20OR PANEL LAMPS DRIVER
2 Z234 18BK GROUND
3 T6 18OR/WT OVERDRIVE OFF SWITCH SENSE
4 Z300 18BK GROUND
5 F12 20DB/WT FUSED IGNITION SWITCH OUTPUT (RUN-START)
6 K29 18WT/PK SECONDARY BRAKE SWITCH SIGNAL
SHIFTER ASSEMBLY C1 (DIESEL) - BLACK 12 WAY
CAV CIRCUIT FUNCTION
1 F991 20OR/DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
2 F991 20OR/DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
3 F991 20OR/DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
4 T2 20TN/BK BACK-UP LAMP RELAY CONTROL
5 D25 20OR PCI BUS
6 W0 20DB/WT SHIFTER C1 SENSE
7 W1 20VT/WT SHIFTER C2 SENSE
8 W2 20VT SHIFTER C3 SENSE
9 W3 20BK SHIFTER C4 SENSE
10 W4 20PK/OR SHIFTER C5 SENSE
11 Z234 20WT GROUND
12 Z234 20WT GROUND
SHIFTER ASSEMBLY C2 (DIESEL)-6WAY
CAV CIRCUIT FUNCTION
1- -
2- -
3 F12 20DB/WT FUSED IGNITION SWITCH OUTPUT (RUN-START)
4 K2 20WT/PK SECONDARY BRAKE SWITCH SIGNAL
5 F991 20OR/DB FUSED IGNITION SWITCH OUTPUT (RUN-START)
6 Y1 20DB/PK PARK LOCKOUT SOLENOID CONTROL
SIREN (BUILT-UP-EXPORT)-3WAY
CAV CIRCUIT FUNCTION
1 Z141 18BK GROUND
2 X75 18GY/LB (DIESEL) SIREN SIGNAL CONTROL
2 X75 18GY/LG (GAS) SIREN SIGNAL CONTROL
3 M1 18PK FUSED B(+)
SPEED CONTROL SWITCH NO. 1 - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1- -
2 K4 20BK/LB SENSOR GROUND
3 V37 20RD/LG SPEED CONTROL SWITCH SIGNAL
4- -
8W - 80 - 120 8W-80 CONNECTOR PIN-OUTWJ

the same time, the power distribution system was
designed to provide ready access to these electrical
distribution points for the vehicle technician to use
when conducting diagnosis and repair of faulty cir-
cuits. The power distribution system can also prove
useful for the sourcing of additional electrical circuits
that may be required to provide the electrical current
needed to operate accessories that the vehicle owner
may choose to have installed in the aftermarket.
NOTE: DO NOT ATTEMPT TO SWAP POWER DIS-
TRIBUTION CENTERS FROM ONE VEHICLE TO
ANOTHER. MOST OF THESE ASSEMBLIES ARE
VEHICLE FEATURE SPECIFIC AND THEREFORE
NOT INTERCHANGEABLE. ALWAYS USE THE COR-
RECT PART NUMBERED ASSEMBLY WHEN DIAG-
NOSING OR REPLACING A POWER DISTRIBUTION
CENTER.
SPECIAL TOOLS
POWER DISTRIBUTION SYSTEMS
CIGAR LIGHTER OUTLET
DESCRIPTION
A cigar lighter outlet is standard equipment on
this model. On models equipped with the optional
Smoker's Package, the cigar lighter knob and heating
element are included. On models without the Smok-
er's Package, the cigar lighter outlet is equipped with
a snap fit plastic cap and is treated as an extra
accessory power outlet. The cigar lighter outlet is
installed in the instrument panel center lower bezel,
which is located near the bottom of the instrument
panel center stack area, below the heater and air
conditioner controls. The cigar lighter outlet is
secured by a snap fit within the center lower bezel.The cigar lighter outlet, plastic cap and the knob
and heating element unit are available for service
replacement. These components cannot be repaired
and, if faulty or damaged, they must be replaced.
OPERATION
The cigar lighter consists of two major components:
a knob and heating element unit, and the cigar
lighter base or outlet shell. The receptacle shell is
connected to ground, and an insulated contact in the
bottom of the shell is connected to battery current.
The cigar lighter receives battery voltage from a fuse
in the junction block when the ignition switch is in
the Accessory or On positions.
The cigar lighter knob and heating element are
encased within a spring-loaded housing, which also
features a sliding protective heat shield. When the
knob and heating element are inserted in the outlet
shell, the heating element resistor coil is grounded
through its housing to the outlet shell. If the cigar
lighter knob is pushed inward, the heat shield slides
up toward the knob exposing the heating element,
and the heating element extends from the housing
toward the insulated contact in the bottom of the
outlet shell.
Two small spring-clip retainers are located on
either side of the insulated contact inside the bottom
of the outlet shell. These clips engage and hold the
heating element against the insulated contact long
enough for the resistor coil to heat up. When the
heating element is engaged with the contact, battery
current can flow through the resistor coil to ground,
causing the resistor coil to heat.
When the resistor coil becomes sufficiently heated,
excess heat radiates from the heating element caus-
ing the spring-clips to expand. Once the spring-clips
expand far enough to release the heating element,
the spring-loaded housing forces the knob and heat-
ing element to pop back outward to their relaxed
position. When the cigar lighter knob and element
are pulled out of the outlet shell, the protective heat
shield slides downward on the housing so that the
heating element is recessed and shielded around its
circumference for safety.
DIAGNOSIS AND TESTING - CIGAR LIGHTER
OUTLET
For complete circuit diagrams, refer toHorn/Ci-
gar Lighter/Power Outletin Wiring Diagrams.
(1) Check the fused B(+) fuse in the junction block.
If OK, go to Step 2. If not OK, repair the shorted cir-
cuit or component as required and replace the faulty
fuse.
(2) Turn the ignition switch to the On position.
Check for battery voltage at the fused B(+) fuse in
Terminal Pick Kit 6680
8W - 97 - 2 8W-97 POWER DISTRIBUTIONWJ
POWER DISTRIBUTION (Continued)

the junction block. If OK, go to Step 3. If not OK,
repair the open or short as required.
(3) Remove the cigar lighter knob and element
from the cigar lighter outlet shell. Check for continu-
ity between the inside circumference of the cigar
lighter outlet shell and a good ground. there should
be continuity. If OK, go to Step 4. If not OK, go to
Step 5.
(4) Turn the ignition switch to the On position.
Check for battery voltage at the insulated contact
located at the back of the cigar lighter outlet shell. If
OK, replace the faulty cigar lighter knob and ele-
ment. If not OK, go to Step 5.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Remove the instrument panel center lower bezel.
Check for continuity between the ground circuit cav-
ity of the cigar lighter wire harness connector and a
good ground. There should be continuity. If OK, go to
Step 6. If not OK, repair the open ground circuit to
ground as required.
(6) Connect the battery negative cable. Turn the
ignition switch to the Accessory or On positions.
Check for battery voltage at the fused B(+) circuit
cavity of the cigar lighter wire harness connector. If
OK, replace the faulty cigar lighter outlet. If not OK,
repair the open fused B(+) circuit to the junction
block fuse as required.
CIGAR LIGHTER OUTLET
DOOR SPRING
REMOVAL
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the instrument panel center lower
bezel from the I.P. Refer to Body for the procedure.
(3) Remove the cigar lighter outlet door spring
from its locating holes (Fig. 1).
INSTALLATION
(1) Install the cigar outlet door spring in its locat-
ing holes.
(2) Install the instrument panel center lower bezel
on the I.P. Refer to Body for the procedure.
(3) Connect the negative battery cable.
IOD FUSE
DESCRIPTION
All vehicles are equipped with an Ignition-Off
Draw (IOD) fuse (Fig. 2) that is removed from its
cavity in the Power Distribution Center (PDC) when
the vehicle is shipped from the factory. Dealer per-sonnel are to remove the IOD fuse from the storage
location and install it into PDC fuse cavity 15 as part
Fig. 1 Cigar Lighter Outlet Door Spring
1 - CIGAR LIGHTER OUTLET
2 - CIGAR LIGHTER OUTLET DOOR SPRING
Fig. 2 Ignition-Off Draw Fuse
1 - POWER DISTRIBUTION CENTER
2 - IGNITION-OFF DRAW FUSE
3 - IOD FUSE STORAGE CAVITY
WJ8W-97 POWER DISTRIBUTION 8W - 97 - 3
CIGAR LIGHTER OUTLET (Continued)

JUNCTION BLOCK
DESCRIPTION
An electrical Junction Block (JB) is concealed
beneath the driver side of the instrument panel in
the passenger compartment of the vehicle (Fig. 3).
The JB combines the functions previously provided
by a separate fuseblock module and relay center. The
JB serves to simplify and centralize numerous elec-
trical components, as well as to distribute electrical
current to many of the accessory systems in the vehi-
cle. It also eliminates the need for numerous splice
connections. The JB houses up to thirty-three blade-
type mini fuses, up to two blade-type automatic
resetting circuit breakers, the electronic combination
flasher, the Daytime Running Lamp (DRL) module
(Canada only) and up to twelve International Stan-
dards Organization (ISO) relays (three standard-type
and nine micro-type). The JB also incorporates an
integral connector and mounting for the Body Con-
trol Module (BCM). The BCM is secured with four
screws directly to the dash panel side of the JB.
Refer toBody Control Modulein Electronic Con-
trol Modules for additional information covering the
BCM.
The molded plastic JB housing has integral mounts
that are secured with two screws and two snap
retainers to the instrument panel steering column
support bracket behind the instrument panel steer-ing column opening cover. The JB is concealed above
the molded plastic instrument panel fuse cover. Inte-
gral latches molded into the fuse cover secure it the
JB, the BCM and the 16-way data link connector tab
of the instrument panel steering column support
bracket. The fuse cover can be pulled downward to
disengage the latches and provide service access to
all of the fuses, relays and wire harness connectors of
the JB. The fuse cover has a fuse puller and spare
fuses secured to its upper surface. Refer toInstru-
ment Panel Fuse Coverin Body for additional ser-
vice information.
The JB unit cannot be repaired and is only ser-
viced as an assembly. If any internal circuit or the JB
housing is faulty or damaged, the entire JB unit
must be replaced. The BCM is available for separate
service replacement.
OPERATION
All of the circuits entering and leaving the Junc-
tion Block (JB) do so through up to five wire harness
connectors, which are connected to the JB through
integral connector receptacles molded into the JB
housing. Internal connection of all of the JB circuits
is accomplished by a printed circuit board. There are
also two separate wire harness connections to con-
nector receptacles that are integral to the BCM.
Refer toJunction Blockin Wiring Diagrams for
additional information and the location of complete
JB circuit diagrams.
REMOVAL
WARNING: DISABLE THE AIRBAG SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. DISCON-
NECT AND ISOLATE THE BATTERY NEGATIVE
(GROUND) CABLE, THEN WAIT TWO MINUTES FOR
THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE
BEFORE PERFORMING FURTHER DIAGNOSIS OR
SERVICE. THIS IS THE ONLY SURE WAY TO DIS-
ABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN
ACCIDENTAL AIRBAG DEPLOYMENT AND POSSI-
BLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the fuse cover from the bottom of the
Junction Block (JB).
(3) Remove the steering column opening cover
from the instrument panel. Refer toSteering Col-
umn Opening Coverin Body for the location of
steering column opening cover removal procedures.
Fig. 3 Junction Block Location
1 - REAR LATCHES
2 - JUNCTION BLOCK AND BODY CONTROL MODULE UNIT
3 - INSTRUMENT PANEL FUSE COVER
4 - SIDE LATCH
5 - FRONT LATCHES
WJ8W-97 POWER DISTRIBUTION 8W - 97 - 5