1994 JEEP CHEROKEE key

CHIME/BUZZER WARNING SYSTEMS
CONTENTS
page page
GENERAL.............................. 1
IGNITION KEY WARNING SWITCH REPLACEMENT.4OPERATION/DIAGNOSIS.................. 1
GENERAL
The buzzer or optional chime module is mounted on
the left side of the fuse block (above and to the left of
the brake/clutch pedal). The buzzer or chime sounds
an audible warning tone in any of the following con-
ditions:
²Vehicle lights are ON when the ignition has been
switched OFF and the key is removed and then the
driver's door is opened (except YJ).²The key is in the ignition and the driver's door is
open (On some vehicles, the buzzer will not sound if
the ignition switch is in the ON position).
²The ignition is switched ON and the driver's seat
belt is not buckled. Buzzer will quit after 4 to 8 sec-
onds. Besides the buzzer, a seat belt indicator lamp
turns on as a reminder to fasten seat belt.
OPERATION/DIAGNOSIS
OPERATION
Battery voltage for module operation is supplied to
two pins. Voltage is always present at pin 7. Pin 1
receives voltage when the ignition switch is in the
ON or START position.
SEAT BELT WARNING
The seat belt warning system uses both visual and
audible signals. These consist of a buzzer that is part
of a combined seat belt and key warning buzzer and
a red light on the instrument panel.
The system will always illuminate the seat belt
warning lamp for four to eight seconds when the ig-
nition switch is turned to the ON position. Also, only
if the driver does not fasten his seat belt, the buzzer
will sound during the same time interval. Passenger
belts are not connected to the system.
A timed buzzer-relay is used to operate the system
for the time period. It has a time delay mechanism
and buzzer assembly. Only the driver's seat belt
buckle has a switch that is connected to the system.
KEY-IN-IGNITION WARNING
To sound the key-in-ignition warning, the following
must occur:
²the ignition key warning switch must be closed
²the driver's door jamb switch must be closed.
These conditions ground pin 6 of the module. These
switches are closed when the key is in the ignition
and the driver's door is open.On some vehicles the chime/buzzer will not
sound if the door is open and the key is in the
ON position.
LIGHTS-ON WARNING (EXCEPT YJ)
To sound the lights-on warning, the following must
occur:
²the headlamp switch must be closed
²the driver's door jamb switch must be closed.
These conditions ground pin 6 of the module. These
switches are closed when the headlamp switch is ON
and the driver's door is open.
DIAGNOSIS
If the buzzer/chime unit does not operate as de-
scribed, check the two fuses for pins 1 and 7 (Figs. 1
and 2) and replace as required. If the fuses are not
defective, perform the following tests to determine if
the problem is in the module or in the wiring. Using
a flat head screwdriver, release the locking plastic
clip while carefully pulling out the module. Plug in a
known good module and check its operation. If the
problem is not corrected by replacing the module, re-
move the module and continue as follows:
VOLTAGE TESTS
Ignition in ON position, measure between the
following pins and vehicle ground.
²Measure voltage at buzzer/chime module connector
pin 1. Meter should read battery voltage. If not, re-
pair open to ignition switch.
Turn ignition OFF and remove the key from the ig-
nition.
JCHIME/BUZZER WARNING SYSTEMS 8U - 1

²Measure voltage at buzzer/chime module connector
pin 7. Meter should read battery voltage. If not, re-
pair open to fuse.
RESISTANCE TESTS
CAUTION: Before using an ohmmeter, turn ignition
switch OFF and disconnect negative cable from bat-
tery to avoid damaging the meter.
Measure between the following pins and vehi-
cle ground.
²Buzzer/chime module connector pin 2. Meter
should read almost zero ohms (bulb filament). If not,
replace seat belt indicator bulb.
²Buzzer/chime module connector pin 3. Meter
should read zero ohms. If not, repair open to ground.
²Buzzer/chime module connector pin 4. Drivers seat
belt not buckled. Meter should read zero ohms. If not,
repair open to ground (or buckle switch may be de-
fective). Meter should read open circuit if drivers
seat belt is buckled. If not, repair short to ground (or
buckle switch may be defective).
²Buzzer/chime module connector pin 6. Open driv-
er's door, key in ignition (in OFF position). Meter
should read zero ohms. If not, repair open to ground.
²Buzzer/chime module connector pin 6. Remove key
from ignition. Open driver's door, headlamp switch
ON (except YJ), meter should read zero ohms. If not,
repair open to ground.
Fig. 2 Buzzer Module Terminal Identification
Fig. 1 Buzzer Module Connector Terminal
IdentificationÐPin Side
8U - 2 CHIME/BUZZER WARNING SYSTEMSJ

IGNITION KEY WARNING SWITCH REPLACEMENT
(1) Disconnect negative cable from battery.
(2) Remove horn button with a push and turn mo-
tion.
(3) Remove horn button components (Fig. 1).
(4) Turn key to LOCK position and remove steer-
ing wheel nut and washer.
(5) Scribe an alignment mark on steering wheel in
line with mark already existing on end of steering
column.
(6) Remove vibration damper from steering column
hub, if equipped.
(7) Remove steering wheel using a steering wheel
puller. DO NOT hammer on puller or end of steering
shaft.
WARNING: TO REMOVE THE STEERING SHAFT
SNAP RING IN THE FOLLOWING STEP, THE LOCK-
PLATE MUST BE COMPRESSED. DO NOT AT-
TEMPT TO REMOVE THE LOCKPLATE WITHOUT
COMPRESSOR TOOL C4156 AS THE LOCKPLATE
IS UNDER HEAVY SPRING TENSION.
(8) Compress lockplate with compressor tool
C4156.
(9) Remove steering shaft snap ring (Fig. 2). Dis-
card snap ring. It is not reusable.
(10) Remove compressor tool.
(11) Remove lockplate, cancelling cam, and upper
bearing preload spring.
(12) Remove horn button components from cancel-
ing cam.(13) Remove screw and hazard warning switch
knob.
(14) Remove dimmer switch actuator arm attach-
ing screw (Fig. 3).
(15) Remove turn/hazard switch attaching screws
(Fig. 3).
(16) Unplug wiper switch connector.
(17) Push turn/hazard connector up and out of
Fig. 1 Steering Wheel Removal/Installation
Fig. 2 Lockplate Removal
Fig. 3 Turn/Hazard Switch And Dimmer Actuating
Arm Screws
8U - 4 CHIME/BUZZER WARNING SYSTEMSJ

steering column connector (Fig. 4).
(18) Pry up locking tabs of steering column connec-
tor and remove connector from column bracket.
(19) Pull turn/hazard switch out of the column far
enough to allow access to remaining screws.
(20) Insert ignition key in the lock cylinder and
turn key to ON position.(21) Remove key warning buzzer switch and re-
taining clip with a paper clip. Insert paper clip below
retainer so that retainer is flattened (Fig. 5).
Do not attempt to remove buzzer switch and
clip separately. The clip could fall into the col-
umn jacket.
(22) Reverse the removal procedures to assemble
steering column.
(23) Install steering wheel. Tighten steering wheel
nut to 34 Nzm (25 ft. lbs.) torque.
Fig. 4 Turn/Hazard Switch And Steering Column
Connectors
Fig. 5 Buzzer Switch Removal
JCHIME/BUZZER WARNING SYSTEMS 8U - 5

WIRING DIAGRAMS
CONTENTS
page page
FUSE CHARTS AND RELAY BANKS......... 8
GENERAL INFORMATION.................. 1
SPLICE LOCATIONS..................... 53
WIRING AND COMPONENT IDENTIFICATION . 13WIRING DIAGRAMS XJ.................. 149
WIRING DIAGRAMS XJ RHD............. 271
WIRING DIAGRAMS YJ.................. 73
GENERAL INFORMATION
INDEX
page page
Circuit Identification........................ 2
Component Identification.................... 2
Connector and Terminal Assembly Replacement . . 5
Connector Replacement.................... 4
Connectors.............................. 3
Fusible Link Replacement................... 4
Fusible Links............................. 3
Locating A System........................ 2Secondary Ignition Wiring................... 1
Splice Locations.......................... 2
Symbols, Fuses and Abbreviations............ 6
Terminal Replacement...................... 5
Troubleshooting Wiring Problems.............. 3
Wire Code Identification.................... 2
Wiring Diagram Sheets and Indexes........... 1
Wiring Repair............................ 4
The wiring diagrams contain the latest information
at the time of publication.
Throughout this group references may be made to
a particular vehicle by letter or number designation.
A chart showing the breakdown of these designations
is included in the Introduction Section at the front of
this service manual.
SECONDARY IGNITION WIRING
Secondary ignition wiring is shown in Figures 1
and 2. For additional information on ignition systems
or distributor operation refer to Group 8D Ignition
Systems.
WIRING DIAGRAM SHEETS AND INDEXES
The diagrams are organized to show the basic ve-
hicle and all of its options. Add-on or non-factory op-
tions are not covered. The diagram pages are
identified by a sheet number which is located at the
lower right or left hand corner of each sheet.Page
numbers at the top of each page do not apply to
diagram sheets.
Diagram sheets show all information relating to
the system. This includes feeds, grounds, switch in-
ternal circuity, connectors, splices, and pin identifica-
tion for controllers and modules. All components,switches, and relays are shown in the at rest position
with the key removed from the ignition and the doors
closed.
In certain instances a wire may be referenced to
another sheet. When this happens, the wire will be
identified as to where it is going.
The index used for the diagrams is located at the
beginning of the section. The main system and all re-
lated components are covered.
Fig. 1 Secondary Ignition Wiring 2.5L
JWIRING DIAGRAMS 8W - 1

Wiring Diagram Name Sheet Number
Left Fog Lamp.............................27
Left Headlamp.............................27
Left Park and Turn Signal Lamp.................27
Left Side Marker Lamp.......................27
Right Fog Lamp............................28
Right Headlamp............................28
Right Park and Turn Signal Lamp................28
Right Side Marker Lamp......................28
Fuel Gauge................................44
Fuel Injection Ignition System
2.5L Engine.................11, 12, 13, 14, 15, 16
Automatic Shut Down Relay....................11
Camshaft Position Sensor.....................12
Crankshaft Position Sensor.....................12
Data Link Connector.........................13
Engine Coolant Temperature Sensor...............15
Fuel Injectors.............................14
Fuel Pump Relay...........................11
Heated Oxygen Sensor.......................11
Idle Air Control Motor........................14
Ignition Coil..............................13
Intake Air Temperature Sensor..................15
MAP Sensor..............................15
Power Steering Switch.......................14
Powertrain Control Module (PCM) . . .11, 12, 13, 14, 15, 16
Throttle Position (Sensor).....................15
Vehicle Speed Sensor........................12
Fuel Injection Ignition System
4.0L Engine.................17, 18, 19, 20, 21, 22
Automatic Shut Down Relay....................17
Camshaft Position Sensor.....................18
Crankshaft Position Sensor.....................18
Data Link Connector.........................19
Engine Coolant Temperature Sensor...............21
Fuel Injectors.............................20
Fuel Pump Relay...........................17
Heated Oxygen Sensor.......................17
Idle Air Control Motor........................20
Ignition Coil..............................19
Intake Air Temperature Sensor..................21
MAP Sensor..............................21
Powertrain Control Module (PCM) . . .17, 18, 19, 20, 21, 22
Throttle Position (Sensor).....................21
Vehicle Speed Sensor........................18
Fuel Injectors............................14, 20
Fuel Pump Relay..........................11, 17
Fuel Tank System............................55
Fuel Tank Sending Unit.........................55
Fuse Application Chart........................1,2
Fuses
1 .................................2,10,37
3 ..............................1,30,34,36
4 .................................2,10,34
5 ..............................2,10,13,19
6 .................................1,30,53
7 ..............................2,10,24,46
8 ...................................1,29
9 .................................2,10,36Wiring Diagram Name Sheet Number
10 ...................................1,31
11 .............................2,10,38,39
12 ...........................2,10,47,48,50
F13 ..................................2,58
F15 ..............................2,4,6,33
F16 ............................2,4,6,8,35
Fuse Panel..............................61, 62
Gauge Package Connector.......................43
Gauges
Electronic Speedometer.......................42
Electronic Tachometer........................42
Engine Coolant Temperature Gauge...............44
Engine Oil Pressure Gauge.....................44
Fuel Gauge...............................44
Voltmeter................................44
Generator................................3,5
Hazard Signal Flasher..........................34
Headlamps.........................25, 26, 27, 28
Headlamp Switch........................1,29,30
Dimmer Switch............................29
Headlamp Switch...........................29
Heated Oxygen Sensor......................11, 17
Heated Rear Window Relay......................54
Heated Rear Window Switch.....................53
Heated Rear Window System..................53, 54
Heated Rear Window Grid.....................53
Heated Rear Window Relay....................54
Heated Rear Window Switch....................53
Timer..................................54
Heater Control Panel Illumination..................32
Heater System..............................47
Blower Motor.............................47
Blower Resistor............................47
Blower Switch.............................47
Heater/Off Switch...........................47
Horn.....................................33
Horn Brush/Slip Ring........................33
Horn Relay...............................33
Horn Switch..............................33
Hydraulic Actuation Unit........................58
Idle Air Control Motor.......................14, 20
Ignition Coil.............................13, 19
Ignition Key Warning Switch.....................36
Ignition Switch..........................2,9,10
Instrument Panel Illumination Lamps................32
Intake Air Temperature Sensor.................15, 21
Intermittent Wiper Module.......................40
Intermittent Wiper System....................39, 40
Intermittent Wiper Module.....................40
Park Switch..............................39
Washer Pump.............................39
Wiper Motor..............................39
Wiper/Washer Switch........................40
W/Wiper Circuit Breaker (5.3 Amp)...............39
Lamps
Center High Mounted Stop Lamps................52
Dome Lamp..............................35
Instrument Panel Illumination Lamp...............32
8W - 74 WIRING DIAGRAMSJ

Wiring Diagram Name Sheet Number
Left Back-Up Lamp..........................51
Left Courtesy Lamp.........................35
Left Fog Lamp..........................25, 27
Left Headlamp..........................25, 27
Left Park and Turn Signal Lamp..............25, 27
Left Side Marker Lamp....................25, 27
Left Tail, Stop and Turn Signal Lamp..............51
Right Back-Up Lamp.........................52
Right Courtesy Lamp........................35
Right Fog Lamp.........................26, 28
Right Headlamp.........................26, 28
Right Park and Turn Signal Lamp.............26, 28
Right Side Marker Lamp...................26, 28
Right Tail, Stop and Turn Signal Lamp.............52
Underhood Lamp............................8
Left Back-Up Lamps..........................51
Left Courtesy Lamp...........................35
Left Fog Lamp...........................25, 27
Left Front Door Jamb Switch.....................35
Left Front Speaker............................46
Left Halo Speaker............................46
Left Headlamp............................25, 27
Left Park and Turn Signal Lamp................25, 27
Left Side Marker Lamp......................25, 27
Left Tail, Stop and Turn Signal Lamp...............51
MAP Sensor.............................15, 21
Mercury Switch..............................8
Modules
ABS Control Module....................57, 58, 59
Buzzer Module.............................36
Daytime Running Lamp Module.................28
Intermittent Wiper Module.....................40
Motors
Blower Motor.............................47
Engine Starter Motor.........................7
Idle Air Control Motor.....................14, 20
Rear Wiper Motor..........................37
Wiper Motor...........................38, 39
Oil Pressure and Temp System...................23
Panel Lamp Dimmer Switch......................1
Panel Lamps.............................31, 32
Accessory Illumination........................32
Heater Control Panel Illumination.................32
Panel Lamp Dimmer Switch....................31
Transmission Range Illumination.................32
Park Brake Switch.............................9
Park/Neutral Position Switch......................7
Part Throttle EMCC 3-Speed Automatic Transmission.....56
Part Throttle EMCC Relay.......................56
Part Throttle EMCC Solenoid.....................56
Power Distribution Center.................1,4,6,57
Power Distribution Center Identification Cover..........67
Power Distribution Center Relays..................68
Power Steering Switch.........................14
Powertrain Control Module............11-22, 48, 49, 56
Powertrain Control Module Connector (2.5L Engine)......63
Powertrain Control Module Connector (4.0L Engine)......64
Provisions for A/C (2.5L).......................48Wiring Diagram Name Sheet Number
Radio Illumination Relay........................45
Radio System............................45, 46
Electrically Tuned Radio with Clock...............45
Left Front Speaker..........................46
Left Halo Speaker...........................46
Radio Illumination Relay......................45
Right Front Speaker.........................46
Right Halo Speaker..........................46
Rear Lighting............................51, 52
Center High Mounted Stop Lamp................52
Left Back-Up Lamp..........................51
Left Tail, Stop & Turn Signal Lamp & License Lamp....51
Right Back-Up Lamp.........................52
Right Tail, Stop & Turn Signal Lamp..............52
Rear Wiper/Washer System......................37
Rear Wiper Motor..........................37
Rear Wiper Switch..........................37
Washer Pump.............................37
Relays
A/C ....................................49
ABS Motor Pump Relay.......................57
ABS Power Relay...........................57
Automatic Shut Down Relay.................11, 17
EMCC...................................56
Engine Starter Relay..........................7
Fog Lamp Relays...........................30
Fuel Pump Relay........................11, 17
Heated Rear Window Relay....................54
Horn Relay...............................33
Radio Illumination Relay......................45
Right Back-Up Lamp..........................52
Right Courtesy Lamp..........................35
Right Fog Lamp...........................26, 28
Right Front Door Jamb Switch....................35
Right Front Speaker...........................46
Right Halo Speaker...........................46
Right Headlamp...........................26, 28
Right Park and Turn Signal...................26, 28
Right Side Marker Lamp.....................26, 28
Right Tail, Stop and Turn Signal Lamp..............52
Seat Belt/Ignition Key Warning Buzzer...............36
Seat Belt Switch.............................36
Sensors
ABS Accelerator Sensor.......................59
Brake Pedal Travel Sensor.....................57
Camshaft Position Sensor...................12, 18
Crankshaft Position Sensor..................12, 18
Engine Coolant Temperature Sensor............15, 21
Heated Oxygen Sensor.....................11, 17
Intake Air Temperature Sensor................15, 21
MAP Sensor...........................15, 21
Pump Motor Sensor.........................57
Throttle Position (Sensor)...................15, 21
Vehicle Speed Sensor.....................12, 18
Wheel Sensors............................59
Speakers..................................46
Speedometer...............................42
JWIRING DIAGRAMS 8W - 75

Wiring Diagram Name Sheet Number
Splices
Splice A6................................30
Splice A11..............................4,6
Splice A142............................14, 20
Splice A142-1............................3,5
Splice B15...............................58
Splice E2.............................31, 45
Splice F15...............................58
Splice F30.............................24, 45
Splice G5................................10
Splice G7.............................12, 18
Splice G19...............................58
Splice G50............................13, 19
Splice K4.............................15, 21
Splice K4-1............................12, 18
Splice K6.............................15, 21
Splice K7.............................12, 18
Splice K7-1...............................12
Splice L1................................51
Splice L3................................28
Splice L4................................28
Splice L7................................29
Splice L7-1............................26, 28
Splice L7-2...............................51
Splice L39.............................26, 28
Splice L39-1..............................30
Splice M1................................35
Splice M1-1............................8,35
Splice M2................................35
Splice Z1................................32
Splice Z1-2...............................31
Splice Z1-3...............................32
Splice Z1-4...............................54
Splice Z1-5............................51, 54
Splice Z1-6.........................36, 51, 54
Splice Z1-7............................11, 17
Splice Z1-8...............................8
Splice Z1-9............................26, 28
Splice Z1-10.........................25, 27, 37
Splice Z2................................55
Splice Z12...............................57
Starter Relay................................7
Starter System, Engine..........................7
Steering Column Connector......................70
Stop Lamp Switch............................34
Stop/Turn and Hazard Flasher Systems..............34
Hazard Signal Flasher........................34
Stop Lamp Switch..........................34Wiring Diagram Name Sheet Number
Turn/Hazard Switch Assembly...................34
Turn Signal Flasher..........................34
Switches
A/C Blower Switch..........................50
A/C Low Pressure Switch.....................49
Back-Up Lamp Switch........................7
Blower Switch.............................47
Brake Warning Switch.........................9
Dimmer Switch..........................1,29
Door Jamb Switch..........................35
4-WD Drive Switch..........................8
Fog Lamp Switch...........................30
Headlamp Switch.........................1,29
Heated Rear Window Switch....................53
Heater/Off Switch...........................47
Horn Switch..............................33
Ignition Key Warning Switch....................36
Ignition Switch...........................2,9
Mercury Switch.............................8
Panel/Lamp Dimmer Switch..................1,31
Park Brake Switch...........................9
Park/Neutral Position Switch....................7
Power Steering Switch.......................14
Rear Wiper Switch..........................37
Seat Belt Switch...........................36
Stop Lamp Switch..........................34
Washer Switch..........................38, 40
Wiper/Washer Switch......................38, 40
Tachometer................................42
Throttle Position (Sensor)....................15, 21
Timer....................................54
Transmission Range Illumination...................32
Turn/Hazard Switch Assembly....................34
Turn Signal Flasher...........................34
Underhood Light..............................8
Vehicle Speed Sensor.......................12, 18
Voltmeter..................................44
Washer Pump.........................37, 38, 39
Washer Switch...........................38, 40
Wheel Sensors..............................59
Windshield Wiper System.......................38
Washer Pump.............................38
Washer Switch............................38
Wiper Motor..............................38
Wiper/Washer Switch........................38
W/Wiper Circuit Breaker.......................38
Wiper Switch.............................38
8W - 76 WIRING DIAGRAMSJ