2002 JEEP GRAND CHEROKEE audio

at the enable signal to amplifier circuit cavity of the
power amplifier wire harness connector. If OK, go to
Step 12. If not OK, repair the open enable signal to
amplifier circuit to the radio receiver as required.
(12) Turn the radio receiver off. Turn the ignition
switch to the Off position. Disconnect and isolate the
battery negative cable. For each inoperative speaker
location, check both the amplified feed (+) circuit and
the amplified return (±) circuit cavities of the power
amplifier wire harness connectors for continuity to
ground. In each case there should be no continuity. If
OK, go to Step 13. If not OK, repair the shorted
amplified feed (+) and/or amplified return (±) cir-
cuit(s) to the speaker as required.
(13) For each inoperative speaker location, check
the resistance between the amplified feed (+) circuit
and the amplified return (±) circuit cavities of the
power amplifier wire harness connectors. The meter
should read between 2 and 3 ohms (speaker resis-
tance). If OK, replace the faulty power amplifier. If
not OK, go to Step 14.
(14) Disconnect the speaker wire harness connec-
tor at the inoperative speaker. Check for continuity
between the amplified feed (+) circuit cavities of the
speaker wire harness connector and the power ampli-
fier wire harness connector. Repeat the check
between the amplified return (±) circuit cavities of
the speaker wire harness connector and the power
amplifier wire harness connector. In each case there
should be continuity. If OK, replace the faulty
speaker. If not OK, repair the open amplified feed (+)
and/or amplified return (±) circuit(s) as required.
REMOVAL
REAR DOOR SPEAKER
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the trim panel from the rear door.
(Refer to 23 - BODY/DOORS - REAR/TRIM PANEL -
REMOVAL) for the procedures.
(3) Remove the three screws that secure the
speaker to the rear door inner panel (Fig. 18).
(4) Disconnect the rear door wire harness connec-
tor from the speaker connector receptacle.
(5) Remove the speaker from the rear door inner
panel.
INSTRUMENT PANEL SPEAKER
REMOVAL
(1) Disconnect and isolate the battery negative
cable.(2) Remove the top cover from the instrument
panel. (Refer to 23 - BODY/INSTRUMENT PANEL/
INSTRUMENT PANEL TOP COVER - REMOVAL).
(3) Disconnect the instrument panel wire harness
connector from the speaker wire harness connector
(Fig. 19).
(4) Remove the two screws that secure the speaker
to the top of the instrument panel.
(5) Remove the speaker from the top of instrument
panel.
FRONT DOOR SPEAKER
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the trim panel from the front door.
(Refer to 23 - BODY/DOOR - FRONT/TRIM PANEL -
REMOVAL) for the procedures.
(3) Remove the four screws that secure the
speaker to the front door inner panel (Fig. 20).
(4) Disconnect the front door wire harness connec-
tor from the speaker connector receptacle.
(5) Remove the speaker from the front door inner
panel.
Fig. 18 Rear Door Speaker Remove/Install
1 - PLASTIC NUT (3)
2 - REAR DOOR
3 - REAR DOOR SPEAKER
4 - REAR DOOR WIRE HARNESS
5 - SCREW (3)
8A - 24 AUDIOWJ
SPEAKER (Continued)

INSTALLATION
INSTALLATION - REAR DOOR SPEAKER
(1) Position the speaker to the rear door inner
panel.
(2) Reconnect the rear door wire harness connector
to the speaker connector receptacle.
(3) Position the speaker onto the rear door inner
panel.
(4) Install and tighten the three screws that secure
the speaker to the rear door inner panel. Tighten the
screws to 2.2 N´m (20 in. lbs.).
(5) Install the trim panel onto the rear door. (Refer
to 23 - BODY/DOORS - REAR/TRIM PANEL -
INSTALLATION) for the procedures.
(6) Reconnect the battery negative cable.
INSTALLATION - INSTRUMENT PANEL
SPEAKER
(1) Position the speaker onto the top of the instru-
ment panel.
(2) Install and tighten the two screws that secure
the speaker to the top of the instrument panel.
Tighten the screws to 2.2 N´m (20 in. lbs.).
(3) Reconnect the instrument panel wire harness
connector to the speaker wire harness connector.(4) Install the top cover onto the instrument panel.
(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL TOP COVER - INSTALLA-
TIONl for the procedures.
(5) Reconnect the battery negative cable.
INSTALLATION - FRONT DOOR SPEAKER
(1) Position the speaker to the front door inner
panel.
(2) Reconnect the front door wire harness connec-
tor to the speaker connector receptacle.
(3) Position the speaker onto the front door inner
door panel.
(4) Install and tighten the four screws that secure
the speaker to the front door inner panel. Tighten
the screws to 2.2 N´m (20 in. lbs.).
(5) Install the trim panel onto the front door.
(Refer to 23 - BODY/DOOR - FRONT/TRIM PANEL -
INSTALLATION) for the procedures.
(6) Reconnect the battery negative cable.
Fig. 19 Instrument Panel Speaker Remove/Install
1 - INSTRUMENT PANEL WIRE HARNESS
2 - INSTRUMENT PANEL SPEAKER
3 - SCREW (2)
Fig. 20 Front Door Speaker Remove/Install
1 - PLASTIC NUT (4)
2 - FRONT DOOR
3 - FRONT DOOR SPEAKER
4 - FRONT DOOR WIRE HARNESS
5 - SCREW (4)
WJAUDIO 8A - 25
SPEAKER (Continued)

STANDARD PROCEDURE - IGNITION-OFF
DRAW TEST
The term Ignition-Off Draw (IOD) identifies a nor-
mal condition where power is being drained from the
battery with the ignition switch in the Off position. A
normal vehicle electrical system will draw from five
to thirty-five milliamperes (0.005 to 0.035 ampere)
with the ignition switch in the Off position, and all
non-ignition controlled circuits in proper working
order. Up to thirty-five milliamperes are needed to
enable the memory functions for the Powertrain Con-
trol Module (PCM), digital clock, electronically tuned
radio, and other modules which may vary with the
vehicle equipment.
A vehicle that has not been operated for approxi-
mately twenty days, may discharge the battery to an
inadequate level. When a vehicle will not be used for
twenty days or more (stored), remove the IOD fuse
from the Power Distribution Center (PDC). This will
reduce battery discharging.Excessive IOD can be caused by:
²Electrical items left on.
²Faulty or improperly adjusted switches.
²Faulty or shorted electronic modules and compo-
nents.
²An internally shorted generator.
²Intermittent shorts in the wiring.
If the IOD is over thirty-five milliamperes, the
problem must be found and corrected before replac-
ing a battery. In most cases, the battery can be
charged and returned to service after the excessive
IOD condition has been corrected.
(1) Verify that all electrical accessories are off.
Turn off all lamps, remove the ignition key, and close
all doors. If the vehicle is equipped with an illumi-
nated entry system or an electronically tuned radio,
allow the electronic timer function of these systems
to automatically shut off (time out). This may take
up to three minutes. See the Electronic Module Igni-
tion-Off Draw Table for more information.
ELECTRONIC MODULE IGNITION-OFF DRAW (IOD) TABLE
ModuleTime Out?
(If Yes, Interval And Wake-Up Input)IODIOD After Time
Out
Radio No1to3
milliamperesN/A
Audio Power
AmplifierNoup to 1
milliampereN/A
Body Control Module
(BCM)No5.90
milliamperes
(max.)N/A
Powertrain Control
Module (PCM)No 0.95 milliampere N/A
Transmission Control
Module (TCM) 4.7L
w/45RFEYES (20 minutes, ignition on) 130 milliamperes 0.64 milliampere
ElectroMechanical
Instrument Cluster
(EMIC)No 0.44 milliampere N/A
Combination Flasher No 0.08 milliampere N/A
(2) Determine that the underhood lamp is operat-
ing properly, then disconnect the lamp wire harness
connector or remove the lamp bulb.
(3) Disconnect the battery negative cable.
(4) Set an electronic digital multi-meter to its
highest amperage scale. Connect the multi-meter
between the disconnected battery negative cable ter-
minal clamp and the battery negative terminal post.
Make sure that the doors remain closed so that the
illuminated entry system is not activated. The multi-
meter amperage reading may remain high for up tothree minutes, or may not give any reading at all
while set in the highest amperage scale, depending
upon the electrical equipment in the vehicle. The
multi-meter leads must be securely clamped to the
battery negative cable terminal clamp and the bat-
tery negative terminal post. If continuity between the
battery negative terminal post and the negative cable
terminal clamp is lost during any part of the IOD
test, the electronic timer function will be activated
and all of the tests will have to be repeated.
WJBATTERY SYSTEM 8F - 13
BATTERY (Continued)

²Ten-way power drivers and passenger seats
with Memory- This power seat option is standard
on Overland models and optional on Limited models.
This option includes a six-way adjustable seat cush-
ion track with power seat back recliners and power
lumbar supports. Heated Seats are standard with
this option.
Refer toHeated Seat Systemfor more informa-
tion on the heated seat option. Refer toMemory
Systemin the Memory System section of this group
for more information on the memory system.
The power seat system includes the following com-
ponents:
²Power lumbar adjuster (ten-way power seat
only)
²Power lumbar switch (ten-way power seat only)
²Power seat recliner (ten-way power seat only)
²Power seat switch
²Power seat track.
Refer toPower Seatin Wiring Diagrams for com-
plete circuit diagrams. Following are general descrip-
tions of the major components in the power seat/
memory seat system.
DESCRIPTION - MEMORY SYSTEM
An electronic memory system is standard equip-
ment on the Limited model. The memory system is
able to store and recall the driver side power seat
positions (including the power recliner position), and
both outside power mirror positions for two drivers.
For vehicles with a radio connected to the Program-
mable Communications Interface (PCI) data bus net-
work, the memory system is also able to store and
recall up to twenty - ten AM and ten FM - radio sta-
tion presets for two drivers. The memory system also
will store and recall the last station listened to for
each driver, even if it is not one of the twenty preset
stations.
The memory system will automatically return to
all of these settings when the corresponding num-
bered and color-coded button (Driver 1 - Black, or
Driver 2 - Gray) of the memory switch on the driver
side front door trim panel is depressed, or when the
doors are unlocked using the corresponding num-
bered and color-coded (Driver 1 - Black, or Driver 2 -
Gray) Remote Keyless Entry (RKE) transmitter. A
customer programmable feature of the memory sys-
tem allows the RKE recall of memory features to be
disabled in cases where there are more than two
drivers of the vehicle.
The memory system also has a customer program-
mable easy exit feature that will move the driver
seat rearward 55 millimeters (two inches) or to the
end of its travel, whichever occurs first, when the key
is removed from the ignition switch lock cylinder.A Memory Seat Module (MSM) or Memory Heated
Seat Module (MHSM) are used on this model to con-
trol and integrate the many electronic functions and
features included in the memory system. On vehicles
equipped with the heated seat system option, the
MHSM also controls the functions and features of
that system.
The memory system includes the following compo-
nents:
²Memory seat module (or memory heated seat
module)
²Memory switch
²Position potentiometers on both outside power
mirrors
²Position potentiometers on the driver side power
seat track and power seat recliner motors.
²Radio receiver (if PCI data bus capable).
Certain functions and features of the memory sys-
tem rely upon resources shared with other electronic
modules in the vehicle over the Programmable Com-
munications Interface (PCI) data bus network. The
PCI data bus network allows the sharing of sensor
information. This helps to reduce wire harness com-
plexity, internal controller hardware, and component
sensor current loads. At the same time, this system
provides increased reliability, enhanced diagnostics,
and allows the addition of many new feature capabil-
ities. For diagnosis of these electronic modules or of
the PCI data bus network, the use of a DRBtscan
tool and the proper Diagnostic Procedures manual
are recommended.
The other electronic modules that may affect mem-
ory system operation are as follows:
²Body Control Module (BCM)- Refer toBody
Control Modulein Electronic Control Modules for
more information.
²Driver Door Module (DDM)- Refer toDoor
Modulein Electronic Control Modules for more
information.
²Electronic Vehicle Information Center
(EVIC)- Refer toElectronic Vehicle Information
Centerin Overhead Console Systems for more infor-
mation.
²Passenger Door Module (PDM)- Refer to
Door Modulein Electronic Control Modules for
more information.
²Powertrain Control Module (PCM)- Refer to
Powertrain Control Modulein Electronic Control
Modules for more information.
²Radio Receiver- Refer toRadio Receiverin
Audio Systems for more information.
Refer toHeated Seat Systemfor more informa-
tion on this system. Refer toRemote Keyless Entry
Systemin Power Lock Systems for more information
on the RKE system. Refer toPower Mirrorin
Power Mirror Systems for more information on the
WJPOWER SEAT SYSTEM 8N - 19
POWER SEAT SYSTEM (Continued)

WIRING
TABLE OF CONTENTS
page page
WIRING DIAGRAM INFORMATION....... 8W-01-1
COMPONENT INDEX.................. 8W-02-1
POWER DISTRIBUTION............... 8W-10-1
JUNCTION BLOCK.................... 8W-12-1
GROUND DISTRIBUTION.............. 8W-15-1
BUS COMMUNICATIONS.............. 8W-18-1
CHARGING SYSTEM.................. 8W-20-1
STARTING SYSTEM.................. 8W-21-1
FUEL/IGNITION SYSTEM.............. 8W-30-1
TRANSMISSION CONTROL SYSTEM..... 8W-31-1
VEHICLE SPEED CONTROL............ 8W-33-1
ANTILOCK BRAKES................... 8W-35-1
VEHICLE THEFT SECURITY SYSTEM..... 8W-39-1
INSTRUMENT CLUSTER............... 8W-40-1
HORN/CIGAR LIGHTER/POWER OUTLET . . 8W-41-1
AIR CONDITIONING-HEATER........... 8W-42-1
AIRBAG SYSTEM.................... 8W-43-1
INTERIOR LIGHTING.................. 8W-44-1
BODY CONTROL MODULE............. 8W-45-1AUDIO SYSTEM..................... 8W-47-1
REAR WINDOW DEFOGGER............ 8W-48-1
OVERHEAD CONSOLE................. 8W-49-1
FRONT LIGHTING.................... 8W-50-1
REAR LIGHTING..................... 8W-51-1
TURN SIGNALS...................... 8W-52-1
WIPERS............................ 8W-53-1
TRAILER TOW....................... 8W-54-1
POWER WINDOWS................... 8W-60-1
POWER DOOR LOCKS................ 8W-61-1
POWER MIRRORS................... 8W-62-1
POWER SEATS...................... 8W-63-1
POWER SUNROOF................... 8W-64-1
SPLICE INFORMATION................ 8W-70-1
CONNECTOR PIN-OUT................ 8W-80-1
CONNECTOR/GROUND/SPLICE
LOCATION........................ 8W-91-1
POWER DISTRIBUTION............... 8W-97-1 WJWIRING 8W - 1

DESCRIPTION - CIRCUIT FUNCTIONS
All circuits in the diagrams use an alpha/numeric
code to identify the wire and it's function. To identify
which circuit code applies to a system, refer to the
Circuit Identification Code Chart. This chart shows
the main circuits only and does not show the second-
ary codes that may apply to some models.
CIRCUIT IDENTIFICATION CODE CHART
CIRCUIT FUNCTION
A BATTERY FEED
B BRAKE CONTROLS
C CLIMATE CONTROLS
D DIAGNOSTIC CIRCUITS
E DIMMING ILLUMINATION
CIRCUITS
F FUSED CIRCUITS
G MONITORING CIRCUITS
(GAUGES)
H OPEN
I NOT USED
J OPEN
K POWERTRAIN CONTROL
MODULE
L EXTERIOR LIGHTING
M INTERIOR LIGHTING
N NOT USED
O NOT USED
P POWER OPTION (BATTERY
FEED)
Q POWER OPTIONS (IGNITION
FEED)
R PASSIVE RESTRAINT
S SUSPENSION/STEERING
T TRANSMISSION/TRANSAXLE/
TRANSFER CASE
U OPEN
V SPEED CONTROL, WIPER/
WASHER
W OPEN
X AUDIO SYSTEMS
Y OPEN
Z GROUNDS
DESCRIPTION - SECTION IDENTIFICATION AND
INFORMATION
The wiring diagrams are grouped into individual
sections. If a component is most likely found in a par-
ticular group, it will be shown complete (all wires,
connectors, and pins) within that group. For exam-
ple, the Auto Shutdown Relay is most likely to be
found in Group 30, so it is shown there complete. It
can, however, be shown partially in another group if
it contains some associated wiring.
Splice diagrams in Section 8W-70 show the entire
splice and provide references to other sections the
splices serves. Section 8W-70 only contains splice dia-
grams that are not shown in their entirety some-
where else in the wiring diagrams.
Section 8W-80 shows each connector and the cir-
cuits involved with that connector. The connectors
are identified using the name/number on the dia-
gram pages.
WIRING SECTION CHART
GROUP TOPIC
8W-01 thru
8W-09General information and Diagram
Overview
8W-10 thru
8W-19Main Sources of Power and
Vehicle Grounding
8W-20 thru
8W-29Starting and Charging
8W-30 thru
8W-39Powertrain/Drivetrain Systems
8W-40 thru
8W-49Body Electrical items and A/C
8W-50 thru
8W-59Exterior Lighting, Wipers and
Trailer Tow
8W-60 thru
8W-69Power Accessories
8W-70 Splice Information
8W-80 Connector Pin Outs
8W-91 Connector, Ground and Splice
Locations
8W - 01 - 6 8W-01 WIRING DIAGRAM INFORMATIONWJ
WIRING DIAGRAM INFORMATION (Continued)

8W-47 AUDIO SYSTEM
Component Page
Antenna........................... 8W-47-2
Antenna Module..................... 8W-47-3
Body Control Module............. 8W-47-2, 3, 13
Clockspring........................ 8W-47-13
Compact Disc Changer.............. 8W-47-6, 7
Diagnostic Junction Port...... 8W-47-2, 3, 6, 7, 13
Fuse 5........................... 8W-47-2, 3
Fuse 30.......................... 8W-47-2, 3
G300............................ 8W-47-2, 3
Junction Block.................... 8W-47-2, 3Component Page
Left Front Door Speaker......... 8W-47-4, 10, 11
Left Instrument Panel Speaker....... 8W-47-4, 12
Left Rear Door Speaker.......... 8W-47-5, 10, 11
Left Remote Radio Switch............. 8W-47-13
Power Amplifier..... 8W-47-3, 6, 7, 8, 9, 10, 11, 12
Radio............. 8W-47-2, 3, 4, 5, 6, 7, 8, 9, 13
Right Front Door Speaker........ 8W-47-4, 10, 11
Right Instrument Panel Speaker..... 8W-47-4, 12
Right Rear Door Speaker......... 8W-47-5, 10, 11
Right Remote Radio Switch........... 8W-47-13
WJ8W-47 AUDIO SYSTEM 8W - 47 - 1

C302 - BLACK (FRONT DRIVER DOOR SIDE)
CAV CIRCUIT
1 P112 20YL/WT
2 P114 20YL/RD
3 D25 20YL/VT
4 Z1 12BK
5 E21 20OR/RD
6 Q13 16DB
7 Q23 16RD/WT
8 A146 12OR/WT
9 X85 18LG/DG (LHD PREMIUM)
9 X80 18LG/DG (RHD PREMIUM)
9 X55 18LG/DG (BASE)
10 X53 18LG/RD (BASE)
10 X82 18LG/RD (RHD PREMIUM)
10 X87 18LG/RD (LHD PREMIUM)
11 M1 18PK (JAPAN)
12 -
13 -
14 -
C303 - WHITE (RIGHT BODY SIDE)
CAV CIRCUIT
1 X58 18DB/OR (BASE AUDIO)
1 X92 18TN/DG (PREMIUM AUDIO)
2 X52 18DB/WT (BASE AUDIO)
2 X90 18WT/VT (PREMIUM AUDIO)
3 E21 20OR/DB (RHD)
3 E20 20OR/DB (LHD)
4 P35 18OR/VT
5 P36 18PK/VT
6-
7-
8 Q13 16DB (RHD)
8 Q14 16GY (LHD)
9 Q24 16DG (LHD)
9 Q23 16RD/WT (RHD)
10 Z151 16BK (RHD)
10 Z28 16BK (LHD)
11 G76 18TN/YL (LHD)
11 G76 20TN/YL (RHD)
8W - 80 - 50 8W-80 CONNECTOR PIN-OUTWJ