instrument cluster JEEP CHEROKEE 1995 Service Repair Manual

INTERIOR LIGHTING
INDEX
page page
Accessory Lamp and Heater Control Panel Lamp . . 1
Combination Buzzer........................ 1
Courtesy Lamps and Dome Lamps............. 1
Diagram Index............................ 2General Information........................ 1
Transmission Range Lamp................... 1
Underhood Lamp.......................... 1
GENERAL INFORMATION
Circuit M1 supplies power to the underhood lamp,
dome lamp, right courtesy lamp and left courtesy
lamp. Fuse 12 in the Power Distribution Center
(PDC) protects circuit M1. Circuit A4 from fuse 8 in
the PDC supplies voltage to fuse 12 and circuit M1.
Fuse 12 is referred to as the Ignition Off Draw (IOD)
fuse.
COURTESY LAMPS AND DOME LAMPS
Circuit M1 supplies battery voltage to the dome
lamps and the right and left courtesy lamps. Circuit
M2 provides ground for the lamps through either the
case grounded door jamb switches or through the
dimmer switch to circuit Z1.
In the ON position, the dimmer switch connects
circuit M2 to ground on circuit Z1. When a door
opens, the case grounded door jamb switch closes and
provides ground for the lamps on circuit M2.
HELPFUL INFORMATION
²Circuit M1 also supplies voltage for radio memory,
underhood lamp and the ABS data link connector.
UNDERHOOD LAMP
Circuit M1 supplies battery voltage for the under-
hood lamp. A mercury switch in series after the lamp
connects the lamp to ground on circuit Z1. When the
hood is raised, mercury inside the switch moves to a
position where it connects circuit M1 to circuit Z1, il-
luminating the lamp. The underhood lamp is wired
in parallel with other components on circuit M1.
ACCESSORY LAMP AND HEATER CONTROL PANEL
LAMP
Circuit E1 from the dimmer switch supplies bat-
tery voltage to fuse 10 in the fuse block when the
dimmer switch is in the LOW or ON position. Fuse
10 protects circuit E2 which supplies power to the
heater control panel lamp and the accessory lamp.
Circuit Z1 provides ground for each lamp.
TRANSMISSION RANGE LAMP
Circuit E1 from the dimmer switch supplies bat-
tery voltage to fuse 10 in the fuse block when thedimmer switch is in the LOW or ON positions. Fuse
10 protects circuit E2 which supplies power to the
transmission range lamp. The lamp is case grounded.
COMBINATION BUZZER
The combination buzzer module sounds an audible
warning tone. The tone sounds for seat belt warning
and when the key is in the ignition switch while the
drivers door is open. The tone also sounds when the
ignition switch is in the ON position while the driv-
ers side seat belt is not buckled. Refer to Group 8U
for buzzer operation.
Fuses 3 and 9 in the fuse block protect the combi-
nation buzzer. Fuse 3 powers circuit F32 which con-
nects to the buzzer. Circuit A6 from fuse 3 in the
Power Distribution Center (PDC) supplies power to
the fuse block for circuit F32.
Circuit G5 from fuse 9 also provides voltage to the
combination buzzer when the ignition switch is in
the START or RUN position. The ignition switch con-
nects circuit A1 from fuse 4 in the PDC to circuit
A21. Circuit A21 connects to the fuse block.
When the key-in switch closes, it connects circuit
G26 to circuit G16. Circuit G16 connects to the driv-
ers side door jamb switch. When the drivers side door
is open and the key-in switch is closed, the case
grounded door jamb switch closes and supplies
ground for the buzzer. Circuit G26 from the combina-
tion buzzer connects to the key-in switch.
Circuit G13 form the buzzer powers the seat belt
warning lamp in the instrument cluster. Circuit Z1
at the instrument cluster provides ground for the
lamp.
Circuit G10 from the buzzer connects to the seat
belt switch. When the seat belt is unlatched, the seat
belt switch closes providing ground on circuit Z1.
Circuit Z1 also grounds the combination buzzer
module.
HELPFUL INFORMATION
²Circuit F32 also powers the stop lamp switch.
²Circuit G5 also provides power for the instrument
cluster gauges and warning lamps, heated rear win-
dow relay and A/C compressor clutch relay. On Cana-
J8W-44 INTERIOR LIGHTINGÐYJ VEHICLES 8W - 44 - 1

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

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