1995 JEEP XJ Service And Repair Manual

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JEEP XJ 1995 Service And Repair Manual FRONT LIGHTING
INDEX
page page
Diagram Index............................ 3
Dimming Module........................... 1
Fog Lamps............................... 2
Headlamp Delay Module.................

FRONT LIGHTING
INDEX
page page
Diagram Index............................ 3
Dimming Module........................... 1
Fog Lamps............................... 2
Headlamp Delay Module..................... 1Headlamp Relay........................... 1
Headlamps............................... 1
Parking Lamps............................ 2
HEADLAMPS
The headlamp switch has three positions: ON,
PARK (parking lamps) and OFF. Circuit A3 from fuse
12 in the PDC connects to the headlamp switch and
feeds circuit L7 through fuse 9 in the fuse block. Cir-
cuit L7 connects to the headlamp switch.
Circuit A3 also splices to feed circuit L11 through
fuse 10 in the fuse block. Circuit L11 connects to the
dimmer switch circuitry in the multi-function switch.
The headlamp switch has an internal circuit
breaker that connects circuit A3 to circuit F34. Cir-
cuit F34 connects to the headlamp relay.
HEADLAMP RELAY
When the headlamp switch is in the ON position it
connects circuit A3 from fuse 5 in the Power Distri-
bution Center (PDC) to circuit F34. Circuit A3 is
HOT at all times.
Circuit F34 supplies battery voltage to the coil and
contact sides of the headlamp relay. Circuit Z1 sup-
plies ground for the relay. When voltage is present on
circuit F34, the relay contacts close and connect cir-
cuit F39 to circuit F34.
Circuit F39 powers the headlamps through the
dimmer switch circuitry in the multi-function switch.
HEADLAMP SWITCH IN OFF OR PARKING
LAMP POSITION
Circuit L11 connects to the dimmer switch portion
of the multi-function switch. Circuit L11 supplies
power for the high beams on circuit L3 when the op-
erator flashes the headlamps with the turn signal
stalk of the multi-function switch.
HEADLAMP SWITCH IN ON POSITION
When the headlamp switch is in the ON position,
circuit A3 from fuse 12 in the Power Distribution
Center (PDC) connects to circuit F34. Circuit F34
connects to circuit F39 through the headlamp relay.
Circuit F39 feeds circuit L4 through the headlamp
dimmer switch circuitry in the multi-function switch.
Circuit L4 powers the low beam of the headlamps.
When the operator selects high beam operation
with the turn signal stalk of the multi-functionswitch, circuit L11 connects to the L3 circuit. Circuit
L3 powers high beam operation.
HEADLAMP GROUND
Circuit Z1 provides ground for both the right and
left headlamps. Circuit Z1 also supplies ground the
fog lamps, if equipped.
HELPFUL INFORMATION
²Check fuse 5 in the PDC.
²The headlamp switch has an internal circuit
breaker.
²Circuit L7 is double crimped at the headlamp
switch and branches to the chime module.
HEADLAMP DELAY MODULE
When the operator turns off the ignition switch and
the headlamp switch, the headlamp delay module
powers the headlamps for approximately 45 seconds.
When the ignition switch is in the RUN position,
circuit A21 powers circuit F87 through fuse 17 in the
fuse block. Circuit F87 supplies the IGNITION ON/
OFF signal to the headlamp delay module. Circuit Z1
provides ground for the module.
When the headlamp delay module activates, it con-
nects circuit X4 from fuse 5 in the fuse block to cir-
cuit F34. Circuit F34 connects to the circuit F39
through the headlamp relay. Circuit F39 powers the
headlamps through the headlamp dimmer switch cir-
cuit L4.
HELPFUL INFORMATION
Circuit A7 from fuse 3 in the PDC supplies voltage
to the fuse block bus bar that powers circuit X4
through the fuse in cavity 5.
DIMMING MODULE
Some vehicles are equipped with a dimming mod-
ule. The module is powered by the dimming relay.
In the RUN position, the ignition switch connects
circuit A1 from fuse 6 in the Power Distribution Cen-
ter (PDC) to circuit A38. Circuit A38 powers circuit
L170 through fuse 20 in the fuse block. Circuit L170
supplies power to the dimming relay.
When the headlamps are ON, circuit L90 from the
headlamp switch energizes the dimming relay. When
J8W-50 FRONT LIGHTINGÐXJ-RHD 8W - 50 - 1

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JEEP XJ 1995 Service And Repair Manual energized, the relay supplies power to the dimming
module on a branch of circuit A38. Circuit Z1 pro-
vides ground for the dimming relay.
The dimming module connects to the headlamp
dimmer switch on c

energized, the relay supplies power to the dimming
module on a branch of circuit A38. Circuit Z1 pro-
vides ground for the dimming relay.
The dimming module connects to the headlamp
dimmer switch on circuits L3 and L4.
PARKING LAMPS
Circuit A3 from fuse 5 in the Power Distribution
Center (PDC) connects to a bus bar in the fuse block
which feeds circuit L7. Fuse 9 in the fuse block pro-
tects circuit L7.
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 L7 to circuit
L90. From the headlamp switch, circuit L90 branches
to power the front parking lamps and rear tail
lamps, side marker lamps, and rear license plate
lamps.
GROUND CIRCUIT
Circuit Z1 provides a ground for the parking lamps
and side marker lamps. The Z1 circuit also provide
ground for the headlamps.
HELPFUL INFORMATION
²Check fuse 5 in PDC.
²Check fuse 9 in the fuse block.
²When the headlamp switch is in the PARK or ON
position, the dimmer circuit, L7, also connects to cir-
cuit E2. Circuit E2 continues through fuse 25 in the
fuse block. Circuit E2 powers the illumination lamps.
FOG LAMPS
The fog lamps are controlled by the fog lamp
switch and fog lamp relay. The fog lamps operate
only when the headlamp switch is in the ON posi-
tion, and the operator has selected low-beam opera-
tion. When the headlamps are in high-beam
operation, the fog lamps will not operate.
Circuit F39 from fuse 13 in the Power Distribution
Center (PDC) supplies voltage to the contact side of
the park lamp relay.
When the fog lamp switch closes, it connects circuit
F34 from the headlamp relay to L35. Circuit L35
supplies power to the coil side of the fog lamp relay
and energizes the relay. Ground for the coil side of
the fog lamp relay is provided on circuit Z1.
When fog lamp relay energizes, it connects circuit
F39 to circuit 117. Circuit 117 supplies power to the
fog lamps. Circuit Z1 provides ground for the fog
lamps.
If the high beam lamps are ON, the dimmer switch
does not power circuit L4 and the fog lamp relay
opens. When the relay opens, battery voltage is re-
moved from the fog lamps.
8W - 50 - 2 8W-50 FRONT LIGHTINGÐXJ-RHDJ

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JEEP XJ 1995 Service And Repair Manual DIAGRAM INDEX
Component Page
Chime/Buzzer Module......................8W-50-6
Dimming Module.........................8W-50-9
Dimming Relay..........................8W-50-8
Fog Lamp Relay..............

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