fuse JEEP CHEROKEE 1994 Service Owner's Guide

POWER WINDOWS
CONTENTS
page page
DESCRIPTION........................... 1
DIAGNOSIS (Figs. 1 and 2)............... 1SWITCH TESTING....................... 5
WINDOW REGULATOR REPLACEMENT...... 9
DESCRIPTION
All XJ vehicles, equipped with power windows,
have a cable driven window regulator system. A per-
manent magnet motor moves each power window.
Each motor raises or lowers the glass when voltage
is supplied to the motor. The direction the motor
turns depends on the polarity of the supply voltage.
The control switches control the supply voltage polar-
ity.
With the ignition switch in the ON position voltage
from the 60 amp fuse in the Power Distribution Cen-
ter is applied through the power window circuit
breaker. Power then goes to the master switch termi-
nal BY and to the passenger's window switches.
When the driver's window switch is moved UP, the
contacts close a current path to:
²terminal DV
²driver's side front window motor
²terminal CV
²the DOWN contact of the driver's side front win-
dow to ground.
The motor then moves the glass up.
Current flows in a similar way when the UP con-
tact in one of the passenger's window switches is
closed. Current flow through the passenger's window
motors must go through the driver's and the passen-
ger's window switches before it reaches ground.
Each motor is protected by a built-in circuit
breaker. If a window switch is held on too long with
the window obstructed or after the window is fully
up or down, the circuit breaker opens the circuit. The
circuit breaker resets automatically as it cools. Do
not allow frequent or consecutive resetting of the cir-
cuit breaker to continue.
DIAGNOSIS (Figs. 1 and 2)
For information concerning wiring or connectors,
refer to Group 8W - Wiring Diagrams.
NO WINDOWS OPERATE
²Measure voltage at power window feed connector
at fuse panel. Meter should read battery voltage. If
not, replace 60 amp fuse in Power Distribution Cen-
ter.
²Turn ignition switch to OFF and measure resis-
tance from side of cigar lighter socket to ground.
Meter should read zero ohms. If not, repair open to
ground.
²Remove master door lock/power window switch as-
sembly mounting screws. Measure resistance at BLK
wire (terminal DX) at driver's side switch. Meter
should read zero ohms. If not, repair open to ground
splice of instrument panel harness.
²Turn ignition switch to ON and measure voltage
at terminal BY at driver's side switch. Meter should
read battery voltage. If not, repair open to circuit
breaker.
²Operate window switch. If the windows move up
and down go to Switch Testing.
²Perform Switch Test Driver's Door. If switch
passes test, replace defective motors.
ONE WINDOW OPERATES
Remove door panel of inoperative window,
probe harness side of unplugged motor connec-
tor.
²Measure voltage at terminal A of connector, hold-
ing switch in the DOWN position. Meter should read
battery voltage. If not, repair open back to master
switch. If additional switch is in circuit (not driver's
side motor), refer to Switch Testing.
²Measure resistance at terminal B of connector,
holding switch in the DOWN position. Meter should
read zero ohms. Caution, maintain DOWN position
while meter lead is attached. If not, repair open back
to master switch. If additional switch is in circuit
(not driver's side motor), refer to Switch Testing. If
both tests are OK, replace regulator.
JPOWER WINDOWS 8S - 1

POWER MIRRORS
CONTENTS
page page
DIAGNOSIS............................. 1
GENERAL.............................. 1
POWER MIRROR REPLACEMENT........... 4POWER MIRROR SWITCH REPLACEMENT . . . 4
POWER MIRROR SWITCH TESTING......... 2
GENERAL
For information concerning wiring or connectors,
refer to Group 8W - Wiring Diagrams.
The mirror control switch contains two separate
switches, the operating switch and the selector
switch.
Each mirror has two reversible motors: one to ad-
just the mirror view up and down, the other to adjust
the mirror view right and left. The driver operates
three switches that control the polarity of the voltage
to the motors. The mirror select switch directs these
control voltages to either the right or left mirror.
The mirror select switch must be set to L or R to
direct current flow. If the mirror select switch is set
on R and the up-down switch is moved to the UP po-
sition, the voltage path is:
²through the U contact of switch 1
²to pin E
²to the up-down motor in the right mirror.
The ground path is:
²through pin D
²through the mirror select switch contacts
²to the U contacts of switch 3 and switch 2
²to pin F
²to ground.
The right motor runs and tilts the mirror up.
If the switch is pushed to the DOWN position, thesame motor receives voltage. Now the polarity is re-
versed, with pin E grounded. The motor runs in the
opposite direction.
The right mirror left-right motor operates in a sim-
ilar manner when the control switch is moved to the
L or R positions.
The left mirror works the same way as the right
mirror when mirror select switch is moved to L posi-
tion and control switch is operated.
DIAGNOSIS
For information concerning wiring or connectors,
refer to Group 8W - Wiring Diagrams.
²Open door. Dome lamps should light. If not, check
dome fuse.
Remove switch, unplug switch connector
²Measure resistance at mirror switch connector pin
F. Meter should read zero ohms, If not, repair open to
ground.
²Measure voltage at mirror switch connector pin G.
Meter should read battery voltage. If not, repair open
to dome fuse.
Install a jumper lead from pin E to pin F.
²Connect a jumper lead from pin G to: pin A; pin B;
pin C and then pin D. If the mirror moves, replace
switch. If not, repair open to motor and/or replace
motor.
JPOWER MIRRORS 8T - 1

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

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

WIRE CODE IDENTIFICATION
Each wire shown in the diagrams contains a code
(Fig. 3) which identifies the main circuit, part of the
main circuit, gauge of wire, and color. The color is
shown as a two letter code which can be identified by
referring to the Wire Color Code Chart (Fig. 4). If the
wire has a tracer and it is a standard color an aster-
isk will follow the main wire color. If the tracer is
non-standard the main wire color will have a slash (/)
after it followed by the tracer color.
CIRCUIT IDENTIFICATION
All circuits in the diagrams use an alpha/numeric
code to identify the wire and its 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.
LOCATING A SYSTEM
To locate a system or component in the diagrams,
refer to the alphabetical index at the front of the di-
agrams. Determine the diagram sheet number. Sheet
numbers are located at the lower right or left handcorner of each sheet.Page numbers at the top of
the page do not apply to diagram sheets.
The index identifies the main system and all com-
ponents that relate to that system. There are also
sections of the index that identify specific compo-
nents only (for example modules, lamps, etc.). Refer
to a components name in the index if you are unclear
as to what a system may be called.
Diagram sheets are arranged starting with the bat-
tery and fuses. Then working into charging, starting,
and ignition systems. After this they start at the
front of the vehicle and work to rear. The diagrams
end with connector identification pages.
COMPONENT IDENTIFICATION
When looking for a components location in the vehicle
refer to the Component Identification section index.
This section shows the wire harness routing and the
components location in the vehicle. When using this sec-
tion refer to the wiring diagrams for the general loca-
tion of the component. Then use the component
identification index to locate the proper figure number.
SPLICE LOCATIONS
Splice locations are indicated in the diagrams by a
diamond with a splice circuit code within it (Fig. 5
example 1). If there is more than one splice per cir-
cuit a small box will be connected to it with the
splice number in it (Fig. 5 example 2).
To locate a splice in the wiring harness determine
the splice number from the wiring diagrams then re-
fer to the splice location index. This section shows
the general location of the splice in the harness.
Fig. 2 Secondary Ignition Wiring 4.0L
Fig. 3 Wire Color Code Identification
Fig. 4 Wire Color Code Chart
8W - 2 WIRING DIAGRAMSJ

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

(10) Spread the strands of the wire apart on each
of the exposed wires (Fig. 7 example 1).
(11) Push the two ends of wire together until the
strands of wire are close to the insulation (Fig. 7 ex-
ample 2).
(12) Twist the wires together (Fig. 7 example 3).
(13) Solder the connection together using rosin
core type solder only.Do not use acid core solder.
(14) Center the heat shrink tubing over the joint
and heat using a heat gun. Heat the joint until the
tubing is tightly sealed and sealant comes out of both
ends of the tubing.
(15) Insert the repaired wire into the connector.
(16) Install the connector locking wedge and recon-
nect the connector to its mating half.
(17) Re-tape the wire harness starting 1-1/2 inches
behind the connector and 2 inches past the repair.(18) Connect battery and test affected systems.
SYMBOLS, FUSES AND ABBREVIATIONS
Various symbols are used throughout the wiring di-
agrams. These symbols can be identified by referring
to the symbol identification chart (Fig. 11).
Certain abbreviations are also used in the dia-
grams. These have been developed in such a way
that there meaning should be clear. For fuse block,
relay bank, and power distribution center informa-
tion refer to the fuse charts and relay bank index.
CAUTION: When replacing a blown fuse it is impor-
tant to replace it with a fuse having the correct am-
perage rating. The use of a fuse with a rating other
than indicated may result in an electrical overload.
If a proper rated fuse continues to blow, it indicates
a problem that should be corrected.
8W - 6 WIRING DIAGRAMSJ

FUSE CHARTS AND RELAY BANKS
INDEX
Fig. Fig.
Fuse Panel XJ........................... 2
Fuse Panel YJ........................... 1Power Distribution Center YJ................. 3
Power Distribution Center XJ................. 4
8W - 8 WIRING DIAGRAMSJ

Fig. 1 Fuse Panel YJ
JWIRING DIAGRAMS 8W - 9