
CONNECTORS
The connectors shown in the diagram sheets are
viewed from the terminal end unless otherwise speci-
fied. For viewing bulkhead, powertrain control module,
and transmission control module connectors refer to the
rear of the wiring diagrams. This area shows major con-
nectors and identifies pin and cavity information.
The connectors shown in the diagrams are identi-
fied in two ways. The first is an actual view of the
connector. This view shows the connector and which
cavity the wire is in.
The second way is with the use of arrows to indicate
the connector. This is done when the connector is to
large to be shown on the diagram page. A box placed
next to the connector identifies the connector and the
cavity the wire is in. In certain instances there may be
more than one connector in the same location. When
this happens the connector identification box will have a
number placed in it. Refer to the rear of the diagrams
for a complete pin out of the connector.
TROUBLESHOOTING WIRING PROBLEMS
When troubleshooting wiring problems there are
six steps which can aid in the procedure. The steps
are listed and explained below.(1) Verify the problem.
(2) Verify any related symptoms. Do this by per-
forming operational checks on components that are
in the same circuit as the problem area. Refer to the
wiring diagrams fuse application chart for circuit
identification.
(3) Analyze the symptoms. Use the wiring dia-
grams to determine what the circuit is doing, where
the problem most likely is occurring and where the
diagnosis will continue.
(4) Isolate the problem area.
(5) Repair the problem.
(6) Verify proper operation. For this step check for
proper operation of all items on the circuit repaired.
Refer to the wiring diagram fuse application chart for
circuit identification.
FUSIBLE LINKS
Vehicle wiring harnesses are equipped with fusible
links to protect against harness damage in the event
of a short in the system. Fusible links are color coded
to indicate wire gauge and size. Refer to the fusible
link chart for color and gauge identification (Fig. 6).
Fig. 5 Wiring Splice Examples
Fig. 6 Fusible Link Chart
JWIRING DIAGRAMS 8W - 3

WIRING DIAGRAMS YJ
ALPHABETICAL INDEX
Wiring Diagram Name Sheet Number
ABS Accelerator Sensor........................59
ABS Control Module.....................57, 58, 59
ABS Control Module Connector...................60
ABS Motor Pump Relay........................57
ABS Power Relay............................57
A/C Blower Switch............................50
A/C Compressor.............................49
A/C Low Pressure Switch.......................49
A/C Relay.................................49
A/C Thermostat..............................50
Accessory Illumination.........................32
Air Conditioning System (4.0L).................49, 50
A/C Blower Switch..........................50
A/C Compressor............................49
A/C Low Pressure Switch.....................49
A/C Relay................................49
A/C Thermostat............................50
Field Jumper..............................50
Powertrain Control Module.....................49
Anti-Lock Brake System (TEVES).............57, 58, 59
ABS Accelerator Sensor.......................59
ABS Control Module....................57, 58, 59
ABS Motor Pump Relay.......................57
ABS Power Relay...........................57
Brake Pedal Travel Sensor.....................57
Data Link Connector.........................57
Diode..................................58
Hydraulic Actuation Unit......................58
Left Front Wheel Sensor......................59
Left Rear Wheel Sensor.......................59
Power Distribution Center.....................57
Pump Motor..............................57
Pump Motor Sensor.........................57
Right Front Wheel Sensor.....................59
Right Rear Wheel Sensor......................59
Automatic Shut-Down Relay...................11, 17
Back-Up Lamps...........................51, 52
Back-Up Lamp Switch..........................7
Battery................................1,3,5
Blower Motor...............................47
Blower Resistor.............................47
Blower Switch..............................47
Body Harness Connector........................36
Brake Pedal Travel Sensor.......................57
Brake Warning Switch..........................9
Bulkhead Connector........................65, 66
Buzzer Module..............................36
Camshaft Position Sensor....................12, 18
Center High Mounted Stop Lamp..................52
Charging System 2.5L Engine...................3,4
Battery..................................3
Generator.................................3
Power Distribution Center......................4Wiring Diagram Name Sheet Number
Charging System 4.0L Engine...................5,6
Battery..................................5
Generator.................................5
Power Distribution Center......................6
Cigar Lighter...............................24
Circuit Breakers
Headlamp Switch.........................1,29
#11 (W/Wiper).....................2,10,38,39
Clock....................................45
Cluster Connector............................41
Crankshaft Position Sensor...................12, 18
Data Link Connector.....................13, 19, 57
Daytime Running Lamp Module...................28
Dimmer Switch............................1,29
Dome and Courtesy Lamps......................35
Dome Lamp..............................35
Left Courtesy Lamp.........................35
Left Front Door Jamb Switch...................35
Right Courtesy Lamp........................35
Right Front Door Jamb Switch..................35
Dome Lamp................................35
Electrically Tuned Radio with Clock.................45
Electrical Schematic of Cluster....................42
Electrical Schematic of Gauge Package..............44
Electronic Speedometer.........................42
Electronic Tachometer..........................42
Engine Coolant Temp Gauge.....................44
Engine Coolant Temperature Sensor..............15, 21
Engine Oil Pressure and Temperature System..........23
Engine Coolant Temperature Sending Unit...........23
Engine Oil Pressure Sending Unit................23
Engine Oil Pressure Gauge......................44
Engine Starter System........................2,7
Back-Up Lamp Switch........................7
Engine Starter Motor.........................7
Engine Starter Relay..........................7
Park/Neutral Position Switch....................7
Engine Wiring Connector (16 Way).................69
4-WD Command Trac Switch......................8
Field Jumper...............................50
Fog Lamp Relays............................30
Fog Lamp Switch............................30
Front End Lighting.........................25, 26
Left Fog Lamp.............................25
Left Headlamp.............................25
Left Park and Turn Signal Lamp.................25
Left Side Marker Lamp.......................25
Right Fog Lamp............................26
Right Headlamp............................26
Right Park and Turn Signal Lamp................26
Right Side Marker Lamp......................26
Front End Lighting (Canada)...................27, 28
Daytime Running Lamp Module.................28
JWIRING DIAGRAMS 8W - 73

WIRING DIAGRAMS XJ
INDEX
Wiring Diagram Name Sheet Number
A/C Compressor Clutch Relay...................3,69
A/C Compressor Clutch........................69
A/C Heater Blower Motor.......................70
A/C Low Pressure Switch.......................69
A/C Mode Select Switch........................70
A/C Thermostat..............................69
ABS Diode.................................33
ABS Green Indicator Lamp......................57
ABS Hydraulic Actuation Unit.....................33
ABS #1 Relay.............................3,31
ABS #2 Relay.............................3,31
ABS Pump Motor............................30
ABS Red Indicator Lamp.......................57
Ambient Temperature Sensor.....................53
Antenna...................................71
Antenna Mast...............................71
Anti-Lock Brake Control Module Connector...........109
Anti-Lock Braking System...............29,30,31,32,33
ABS Diode...............................33
ABS Relays...............................31
Anti-Lock Pump Motor.......................30
Anti-Lock Brake System Module.........29,30,31,32,33
Data Link Connector.........................32
G Sensor................................30
Hydraulic Actuation Unit......................33
Left Front Wheel Sensor......................29
Left Rear Wheel Sensor.......................29
Pedal Travel Sensor.........................30
Right Front Wheel Sensor.....................29
Right Rear Wheel Sensor......................29
Anti-Lock Brake System Module...........29,30,31,32,33
Anti-Lock Pump Motor.........................30
Anti-Lock Relay..............................31
Ashtray Lamp...............................48
Automatic Shut Down Relay..................3,12,17
Automatic Transmission Control System (2.5L).........27
Front Axle Lock-Up Switch.....................27
EMCC Relay..............................27
EMCC Solenoid............................27
Back-Up Lamp Switch.........................25
Ballast Resistor..............................89
Battery..................................1,7,8
Blower Motor.............................68,70
Blower Resistors...........................68,70
Blower Switch............................68,70
Body Ground...............................44
Brake Warning Switch.........................67
Bulkhead Disconnect.................101,102,103,104
Camshaft Position Sensor.....................11,20
Cargo Lamp................................50
Center High Mounted Stop Lamp..................98
Charging System 2.5L..........................5
Generator.................................5Wiring Diagram Name Sheet Number
Charging System 4.OL..........................6
Generator.................................6
Chime Module..............................74
Ignition Key Warning Switch....................74
Seat Belt Switch...........................74
Cigar Lighter...............................37
Cigar Lighter Lamp...........................48
Circuit Breakers
In Line Circuit Breaker........................2
Trailer Tow In-Line Circuit Breaker................97
Windshield Wiper Circuit Breaker...............63,64
Connectors
Anti-Lock Brake Control Module Connector.........109
Data Link Connector...................16,18,25,32
Instrument Cluster Connector................55,108
Main Body Connectors.......................112
Power Mirror Connector......................110
Powertrain Control Module Connector.............111
Remote Keyless Entry Module Connector...........114
Steering Column Connector...................106
Telltale Connector........................56,107
Trailer Tow Connector........................93
Transmission Control Module Connector...........105
Cooling Fan Relay...........................3,23
Courtesy Lamp..............................49
Crankshaft Position Sensor....................11,20
Data Link Connector....................16,18,25,32
Daytime Running Lamp Module (DRL)...............38
Daytime Running Lamp System...................38
Diode,ABS.................................33
Distributor Ignition Coil.......................16,18
Dome Lamp................................51
Dome And Courtesy Lamps..................49,50,51
Cargo Lamp..............................50
Dome Lamp..............................51
Dome/Reading Lamp.........................51
Glove Box Lamp...........................49
Left Courtesy Lamp.........................49
Reading Lamp.............................51
Right Courtesy Lamp........................49
Vanity Lamps.............................51
Dome Reading Lamp..........................51
Door Jamb Switch System....................75,76
Left Front Door Jamb Switch...................75
Left Rear Door Jamb Switch...................75
Liftgate Switch............................76
Right Front Door Jamb Switch..................76
Right Rear Door Jamb Switch..................76
EMCC Relay...............................3,27
EMCC Solenoid..............................27
Engine Block Coolant Heater/Cigar Lighter............37
Cigar Lighter..............................37
Engine Block Coolant Heater....................37
JWIRING DIAGRAMS 8W - 149