ignition JEEP CHEROKEE 1995 Service Repair Manual

When the park lamp relay energizes, the relay con-
tacts close and connect circuit F81 from fuse 6 in the
fuse block to circuit L36. Circuit L36 connects to the
contact side of the high beam relay. The contacts in
the high beam relay are normally closed. Battery
voltage flows through high beam relay to the fog
lamps on circuit L39. Circuit L39 also splices to the
lamp in the fog lamp switch.
Circuit L3 from the dimmer switch provides power
for the high beams of the headlamps and connects to
Circuit G34. Circuit G34 powers the coil side of the
high beam relay. Circuit Z1 provides ground for the
coil. When the operator selects high beam operation
or flashes the optical horn, circuit G34 energizes the
high beam relay. When energized, the normally
closed contacts in the relay open, shutting off battery
voltage to the fog lamps on circuit L39.
HELPFUL INFORMATION
²Circuit A6 from fuse 3 in the PDC supplies voltage
to the fuse block for fuses in cavities 3 and 6. Fuse 6
in the fuse block protects circuit F81 which powers
the contact side of the park lamp relay.
²In the high beam position, the dimmer switch con-
nects circuit L20 from the headlamp switch to circuit
L3. The headlamp switch connects circuit A3 from
fuse 7 in the PDC with circuit L20. Circuits A3 and
L20 are HOT at all times.
DAYTIME RUNNING LAMP (DRL) MODULEÐ
CANADIAN VEHICLES ONLY
On Canadian vehicles, the low-beam headlamps op-
erate when the ignition switch is in the RUN position
and the headlamp switch is OFF.
When the ignition switch is in the START or RUN
positions, circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) connects to circuit A21. Circuit
A21 supplies voltage to circuit G5 through fuse 9 in
the fuse block. Circuit G5 splices to supply battery
voltage to the DRL module.
Circuit L20 from the headlamp switch connects to
the DRL module. Circuit L20 is HOT at all times.
The DRL module receives the vehicle speed sensor
input from circuit G7. Circuit G34 from the DRLmodule provides power for the high beam indicator
lamp in the instrument cluster.
Circuit L4 feeds the low beams of the headlamps.
When the headlamp switch is in the OFF position,
the DRL module powers the left and right headlamps
on circuit L4. When the headlamps are ON, the dim-
mer switch powers the low beams on circuit L4.
Circuit L3 feeds the high beams of the headlamps.
When the operator flashes the high beams with the
turn signal stalk, the DRL senses voltage on circuit
L3. When it senses voltage on circuit L3, the DRL
module stops supplying power to the low beams on
circuit L4.
Circuit Z1 provides ground for the DRL module.
Circuit Z1 terminates at the radiator left side sup-
port.
DIAGRAM INDEX
Component Page
Daytime Running Lamp (DRL) Module. . . .8W-50-3, 7, 9, 11
Fog Lamps.............................8W-50-9
Fog Lamp Switch........................8W-50-9
Fuse 3 (PDC)...........................8W-50-3
Fuse 4 (PDC)..........................8W-50-10
Fuse 6 (Fuse Block).......................8W-50-8
Fuse 7 (PDC)........................8W-50-3, 10
Fuse 8 (Fuse Block).......................8W-50-3
Fuse 9 (Fuse Block)......................8W-50-10
Headlamp Switch....................8W-50-3, 8, 10
Headlamp Dimmer Switch.................8W-50-3, 8
High Beam Relay.........................8W-50-9
Ignition Switch.........................8W-50-10
Instrument Cluster..................8W-50-3 thru 10
Left Headlamp.........................8W-50-4, 6
Left Park, Turn Signal Lamp...............8W-50-4, 6
Left Side Marker Lamp...................8W-50-4, 6
Park Lamp Relay.........................8W-50-8
Powertrain Control Module..................8W-50-11
Right Headlamp........................8W-50-5, 7
Right Park, Turn Signal Lamp..............8W-50-5, 7
Right Side Marker Lamp..................8W-50-5, 7
8W - 50 - 2 8W-50 FRONT LIGHTINGÐYJ VEHICLESJ

REAR LIGHTING
TAIL LAMPS AND LICENSE PLATE LAMPS
Circuit A6 in the Power Distribution Center (PDC)
connects to a bus bar in the fuse block. The fuse
block bus bar powers circuit F33. Circuit F33 con-
nects to the headlamp switch. Fuse 3 in the PDC
protects circuit A3. Fuse 8 in the fuse block protects
circuit F33.
The headlamp switch has three positions: ON,
PARK (parking lamps) and OFF, plus a dimmer
switch. When the headlamp switch is in the PARK or
ON position, the switch connects circuit F33 to cir-
cuit L7. From the headlamp switch, circuit L7
branches to power the front parking lamps and rear
tail and license plate lamps. The lamps are case
grounded.
HELPFUL INFORMATION
²If the vehicle is equipped with factory installed fog
lamps, circuit L7 splices to feed the park lamp relay.
²Jumper harnesses connect the tail, stop, turn sig-
nal lamp to the body harness.
²Check fuse 3 in the PDC.
²Check fuse 8 in the fuse block.
²Circuit L7 also feeds the radio, if equipped.
STOP LAMPS AND CHMSL LAMPS
Circuit A6 from fuse 3 in the Power Distribution
Center (PDC) supplies voltage to the fuse block bus
bar. The bus bar powers circuit F32 through fuse 3 in
the fuse block. Circuit F32 connects to the stop lamp
switch.
When the operator depresses the brake pedal, the
stop lamp switch closes, and connects circuit F32 to
circuit L50. Circuit L50 connects to the CHMSL
lamps and turn signal/hazard flasher. Circuit Z1 pro-
vides ground for the CHMSL lamps. The turn signal/
hazard flasher supplies current to the L62 and L63
circuits. Circuit L62 powers the right stop lamp. Cir-
cuit L63 powers the left stop lamp. The stop lamps
are case grounded.
HELPFUL INFORMATION
²Circuits L50 and Z1 pass through contacts in the
rear door before reaching the CHMSL lamps.
²Check fuse 3 in the PDC.²Check fuse 3 in the fuse block.
²Check for continuity across the stop lamp switch
when it is closed.
²If the vehicle is equipped with anti-lock brakes,
circuit L50 connects to the ABS module.
BACK-UP LAMPS
In the START or RUN position, the ignition switch
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A21. Circuit A21 feeds
a bus bar in the fuse block that powers circuit G5
through fuse 9.
Circuit G5 splices to supply power to the back-up
lamp switch. On automatic transmission vehicles, the
back-up lamp switch is part of an assembly that in-
cludes the PARK/NEUTRAL position switch.
When the operator puts the transmission in Re-
verse, the back-up lamp switch connects circuit G5 to
circuit L1. Circuit L1 feeds the case grounded
back-up lamps.
HELPFUL INFORMATION
²Check fuse 4 in the PDC.
²Check fuse 9 in the fuse block.
²Check for continuity across the back-up lamp
switch when it is closed.
DIAGRAM INDEX
Component Page
ABS Control Module......................8W-51-3
Back-Up Lamps..........................8W-51-4
Back-Up Lamp Switch.....................8W-51-2
Center High Mounted Stop Lamps (CHMSL).......8W-51-3
Fuse 3 (Fuse Block).......................8W-51-2
Fuse 3 (PDC)...........................8W-51-2
Fuse 4 (PDC)...........................8W-51-2
Fuse 9 (Fuse Block).......................8W-51-2
Fuse 8 (Fuse Block).......................8W-51-2
Headlamp Switch.........................8W-51-2
Ignition Switch..........................8W-51-2
Powertrain Control Module..................8W-51-3
Stop Lamp Switch........................8W-51-3
Tail, Stop, and Turn Signal Lamps.............8W-51-4
J8W-51 REAR LIGHTINGÐYJ VEHICLES 8W - 51 - 1

TURN SIGNALS
TURN SIGNALS
In the ACCESSORY or RUN position, the ignition
switch connects circuit A1 from fuse 4 in the Power
Distribution Center (PDC) to circuit A31. Circuit A31
feeds circuit L5 through fuse 4 in the fuse block.
Circuit L5 powers the turn signal flasher. Circuit
L6 from the flasher connects to the turn signal/haz-
ard flasher switch which supplies current to the turn
signals. The switch connects to the turn signal and
side marker lamps on circuits L60, L61, L62 and
L63.
RIGHT TURN SIGNAL
When the operator selects the right turn signal, the
turn signal/hazard flasher switch connects power
from circuit L6 to circuits L60 and L62. Circuit L62
feeds the right rear turn signal/hazard flasher/stop
lamp.
Circuit L60 feeds the right front turn signal/hazard
flasher lamp and side marker lamp. Circuit L60 also
splices to power the turn signal indicator lamp on the
instrument cluster.
LEFT TURN SIGNAL
When the operator selects the left turn signal, the
turn signal/hazard flasher switch connects power
from circuit L6 to circuits L61 and L63. Circuit L63
feeds the left rear turn signal/hazard flasher/stop
lamp.
Circuit L61 feeds the left front turn signal/hazard
flasher lamp and side marker lamp. Circuit L61 also
splices to power the turn signal indicator lamp on the
instrument cluster.
GROUND CIRCUIT
Circuit Z1 provides a ground for the left front park
and turn signal lamp, side marker lamp and head
lamp. The grounding point for circuit Z1 is the radi-
ator left support.
Circuit Z1 provides a ground for the right front
park and turn signal lamp, side marker lamp and
head lamp. The grounding point for circuit Z1 is the
radiator right support.
HELPFUL INFORMATION
²Check fuse 4 in the PDC.
²Check fuse 4 in the fuse block.
HAZARD FLASHERS
Circuit L9 from fuse 5 in the Power Distribution
Center (PDC) supplies power to the hazard flasher.
Circuit L19 from the flasher connects to the turn sig-
nal/hazard flasher switch.When the operator presses the hazard flasher but-
ton, the turn signal/hazard flasher switch connects
circuit L19 to circuits L60, L61, L62, and L63. Cir-
cuit L62 powers the right rear turn signal/stop/haz-
ard lamp. Circuit L63 powers the left rear turn
signal/stop/hazard lamp. Circuit L60 powers the right
front indicator lamp. Circuit L61 powers the left
front lamp.
Circuit L60 also splices to feed the instrument clus-
ter right indicator lamp. Circuit L61 splices to feed
the instrument cluster left indicator lamp.
GROUND CIRCUIT
The rear turn signal/stop/hazard lamps are case
grounded.
Circuit Z1 provides a ground for the left front park
and turn signal lamp, side marker lamp and head
lamp. The grounding point for circuit Z1 is the radi-
ator left support.
Circuit Z1 provides a ground for the right left park
and turn signal lamp, side marker lamp and head
lamp. The grounding point for circuit Z1 is the radi-
ator right support.
HELPFUL INFORMATION
Check fuse 5 in the PDC.
DIAGRAM INDEX
Component Page
ABS Control Module......................8W-52-2
Fuse 3 (Fuse Block).......................8W-52-2
Fuse 3 (PDC)...........................8W-52-2
Fuse 4 (Fuse Block).......................8W-52-2
Fuse 4 (PDC)...........................8W-52-2
Fuse 5 (PDC)...........................8W-52-2
Hazard Flasher..........................8W-52-2
Ignition Switch..........................8W-52-2
Instrument Cluster Turn Signal Lamps...........8W-52-3
Stop Lamp Switch........................8W-52-2
Turn Signal Flasher.......................8W-52-2
Turn Signal/Hazard Flasher Switch..............8W-52-3
J8W-52 TURN SIGNALSÐYJ VEHICLES 8W - 52 - 1

WIPERS
INDEX
page page
Diagram Index............................ 2
Rear Wiper System......................... 1WipersÐIntermittent........................ 1
WipersÐStandard.......................... 1
WIPERSÐSTANDARD
A circuit breaker in the fuse block powers the stan-
dard wiper system. The standard wiper system oper-
ates at either LOW or HIGH speeds.
In the ACCESSORY or RUN position, the ignition
switch connects circuit A1 from fuse 4 in the Power
Distribution Center (PDC) with circuit A31. Circuit
A31 supplies voltage to circuit V6 through the circuit
breaker in cavity 11 of the fuse block.
Circuit V6 is double crimped at the circuit breaker
and supplies power to the wiper switch and the park
switch in the wiper motor. Circuit Z1 provides
ground for the wiper motor and switch.
When the operator moves the wiper switch to the
LOW position, battery voltage passes through the
switch to circuit V3. Circuit V3 feeds the wiper motor
low speed brushes. If the operator selects wiper
HIGH speed operation, the wiper switch passes cur-
rent to circuit V4. Circuit V4 feeds the wiper motor
high speed brushes.
As the windshield wiper motor turns, the park
switch, internal to the motor, moves from its DOWN
position to the UP position. When the wiper switch is
turned OFF, the V5 circuit prevents the wipers from
stopping in any position but park.
The windshield washer uses a pump motor located
inside the windshield washer fluid reservoir. When
the washer switch is pressed, power is supplied
through the wiper switch to the pump motor on cir-
cuit V10. Circuit Z1 provide ground for the pump mo-
tor.
WIPERSÐINTERMITTENT
A circuit breaker in the fuse block powers the in-
termittent wiper system. The wiper system operates
at either LOW, HIGH, or DELAY speeds.
In the ACCESSORY or RUN position, the ignition
switch connects circuit A1 from fuse 4 in the Power
Distribution Center (PDC) with circuit A31. Circuit
A31 supplies voltage to circuit V6 through the circuit
breaker in cavity 11 of the fuse block.
Circuit V6 is double crimped at the circuit breaker
and supplies power to the wiper switch and the park
switch in the wiper motor. Circuit Z1 provides
ground for the wiper motor and switch.When the operator moves the wiper switch to the
LOW position, battery voltage passes through the
switch to circuit V3. Circuit V3 feeds the wiper motor
low speed brushes. If the operator selects wiper
HIGH speed operation, the wiper switch passes cur-
rent to circuit V4. Circuit V4 feeds the wiper motor
high speed brushes.
The DELAY portion of the wiper switch contains a
variable resistor. The variable resistor connects to
the intermittent wiper module through the wiper
switch harness. The amount of delay selected by the
operator determines the voltage drop through the re-
sistor and the voltage level received by the intermit-
tent wiper module.
After the intermittent wiper control module deter-
mines the amount of delay selected, it cycles the wip-
ers by periodically energizing circuit V3. Circuit V3
powers the wiper motor low speed brushes.
As the windshield wiper motor turns, the park
switch, internal to the motor, moves from its DOWN
position to the UP position. When the wiper switch is
turned OFF, the V5 circuit prevents the wipers from
stopping in any position but park.
The windshield washer uses a pump motor located
inside the windshield washer fluid reservoir. When
the washer switch is pressed, power is supplied
through the wiper switch to the pump motor on cir-
cuit V10. Circuit Z1 provides ground for the pump
motor.
REAR WIPER SYSTEM
In the RUN position, the ignition switch connects
circuit A1 from fuse 4 in the Power Distribution Cen-
ter (PDC) with circuit A22. Circuit A22 connects to a
fuse block in the bus bar that powers circuit V23
through the fuse in cavity 1.
Circuit V23 supplies power to the park switch in
the rear wiper motor. Also, circuit V22 is crimped to
circuit V23 at the rear wiper motor connector. Circuit
V22 supplies current to the rear wiper switch.
In the WIPE or WASH positions, the rear wiper
switch supplies voltage to the wiper motor on circuit
V13. Circuit Z1 provides ground for the wiper motor.
J8W-53 WIPERSÐYJ VEHICLES 8W - 53 - 1

The rear windshield washer uses a pump motor lo-
cated inside the windshield washer fluid reservoir.
When the rear wiper switch is pressed, power is sup-
plied through the wiper switch to the pump motor on
circuit V20. Circuit Z1 provides ground for the pump
motor.DIAGRAM INDEX
Component Page
Circuit Breaker (Fuse Block Cavity 11).........8W-53-4, 5
Fuse 4 (PDC).......................8W-53-3, 4, 5,
Fuse 4 (Fuse Block).....................8W-53-4, 5
Fuse 7 (Fuse Block).....................8W-53-4, 5
Ignition Switch......................8W-53-3, 4, 5
Intermittent Wiper Control Module.............8W-53-5
Intermittent Wiper Switch...................8W-53-5
Rear Windshield Washer Pump Motor...........8W-53-3
Rear Wiper Motor........................8W-53-3
Standard Wiper Switch.....................8W-53-4
Windshield Washer Pump Motor.............8W-53-4, 5
Wiper Motor..........................8W-53-4, 5
8W - 53 - 2 8W-53 WIPERSÐYJ VEHICLESJ

SPLICE LOCATIONS
GENERAL INFORMATION
This section provides illustrations identifying the
general location of the splices in this vehicle. A splice
index is provided. Use the wiring diagrams in each
section for splice number identification. Refer to the
index for the proper splice number.
SPLICE LOCATIONS
Splice
NumberLocations Fig.
S101 Near PDC T/O.....................1
S102 Near T/O for Engine Wiring.............1
S103 RT Dash Panel Near T/o for Ground.......1
S104 Near T/O for MAP Sensor..............1
S105 Near T/O for MAP Sensor..............1
S106 Left Side of MAP Sensor..............1
S107 In ABS Wiring T/O Near Grommet........1
S108 In ABS Wiring T/O Near Grommet........1
S109 Above Brake Booster.................1
S110 Rear of Generator...................3
S111 2.5L RT Side of Valve Cover...............4
S111 4.0L RT Side of Valve Cover...............3
S112 Near T/O for PRNDL Switch............5
S113 Between Inj #2 and Inj #3.............3
S114 Near T/O for Throttle Body Wiring........3
S115 Above Bulkhead Connector.............1
S116 Above Bulkhead Connector.............1
S117 Near Data Link T/O..................1
S118 Near Data Link T/O..................1
S119 Near Data Link T/O..................1
S120 4.0L RT Side of Valve Cover...............3
S121 2.5L RT Side of Valve Cover...............4
S122 Near T/O for RT PK/TURN Lamp.........2
S123 Near T/O for RT Fog Lamp.............2
S124 Near T/O for LT Fog Lamp.............2
S125 Near T/O for LT PK/TURN Lamp.........2Splice
NumberLocations Fig.
S126 Near T/O for Headlamp...............2
S127 Near T/O for Headlamp...............2
S128 Near T/O for Headlamp...............2
S129 Near Horn T/O.....................2
S201 Near T/O for Dimmer Switch............7
S202 Near T/O for Dimmer Switch............7
S203 Near T/O for Dimmer Switch............7
S204 Near T/O for Dimmer Switch............7
S205 Near T/O for Wiper Switch.............7
S206 Near T/O for Wiper Switch.............7
S207 Near Panel Illumination T/O.............7
S208 Near Panel Illumination T/O.............7
S209 Near Panel Illumination T/O.............7
S210 Near Panel Illumination T/O.............7
S211 Near T/O for Ignition Switch............7
S212 Near T/O for Ignition Switch............7
S213 Near T/O for Radio..................6
S301 Near T/O for Park Brake Switch..........8
S302 Near T/O for Park Brake Switch..........8
S303 Near Grommet LT Rear Quarter Panel......8
S304 Near LT Rear Tail Lamp T/O............8
S305 RT Rear Quarter Panel Near Tail Lamp.....8
S306 Near T/O for Dome Lamp.......Not Shown
S307 In CHMSL Jumper Harness......Not Shown
S308 In CHMSL Jumper Harness......Not Shown
J8W-95 SPLICE LOCATIONSÐYJ VEHICLES 8W - 95 - 1