Jeep Wrangler TJ. Manual — part 309
LAMPS
TABLE OF CONTENTS
page
page
LAMPS/LIGHTING - EXTERIOR . . . . . . . . . . . . . . . 1
LAMPS/LIGHTING - INTERIOR . . . . . . . . . . . . . . . 32
LAMPS/LIGHTING - EXTERIOR
TABLE OF CONTENTS
page
page
LAMPS/LIGHTING - EXTERIOR
DESCRIPTION - TURN SIGNAL & HAZARD
. . . . . . . . . . . . . . . . . . . . . 2
OPERATION - TURN SIGNAL & HAZARD
. . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING - TURN SIGNAL
& HAZARD WARNING SYSTEM . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING - HEADLAMP
SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
. . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . 6
BRAKE LAMP SWITCH
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - BRAKE LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . 8
CENTER HIGH MOUNTED STOP LAMP UNIT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
CENTER HIGH MOUNTED STOP LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
COMBINATION FLASHER
. . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . 10
DAYTIME RUNNING LAMP MODULE
. . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DIAGNOSIS AND TESTING - DAYTIME
. . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . 11
FOG LAMP UNIT
DIAGNOSIS AND TESTING - FRONT FOG
. . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . 13
FOG LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . 14
FOG LAMP RELAY
. . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . 15
FOG LAMP UNIT - REAR
. . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DIAGNOSIS AND TESTING - REAR FOG
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . 17
FOG LAMP - REAR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . 17
FRONT PARK/TURN SIGNAL LAMP UNIT
. . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . 18
FRONT PARK/TURN SIGNAL LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . 18
TJ
LAMPS
8L - 1
HEADLAMP
. . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
. . . . . . . . . . . . . . . . . . . . . . . . . 19
. . . . . . . . . . . . . . . . . . . . . . . . 19
HEADLAMP LEVELING SWITCH
. . . . . . . . . . . . . . . . . . . . . . . . . 21
HEADLAMP LEVELING MOTOR
DIAGNOSIS AND TESTING - HEADLAMP
. . . . . . . . . . . . . . . . . . . 21
LEFT MULTI-FUNCTION SWITCH
. . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DIAGNOSIS AND TESTING - LEFT MULTI-
. . . . . . . . . . . . . . . . . . . 25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
. . . . . . . . . . . . . . . . . . . . . . . . . 27
SIDE MARKER LAMP UNIT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . 28
SIDE MARKER LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . 28
REPEATER LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DIAGNOSIS AND TESTING - SIDE REPEATER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TAIL LAMP UNIT
. . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . 29
TAIL LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . 30
TURN SIGNAL CANCEL CAM
. . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
UNDERHOOD LAMP UNIT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . 31
UNDERHOOD LAMP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . 31
LAMPS/LIGHTING - EXTERIOR
DESCRIPTION - TURN SIGNAL & HAZARD
WARNING SYSTEM
A turn signal and hazard warning system is stan-
dard factory-installed safety equipment. The turn sig-
nal
and
hazard
warning
system
includes
the
following major components, which are described in
further detail elsewhere in this service information:
• Combination Flasher - The electronic combi-
nation flasher is located on the back of the left multi-
function switch, beneath the upper steering column
shroud on the top of the steering column.
• Front Side Marker Lamps - The front side
marker lamps are located on the outboard ends of
the two front fender flares.
• Turn Signal Repeater Lamps - The turn sig-
nal repeater lamps are located on the outboard ends
of the two front fender flares.
• Hazard Warning Switch - The hazard warning
switch is integral to the left multi-function switch.
The hazard warning switch button protrudes from an
opening in the shroud on the top of the steering col-
umn.
• Turn Signal Cancel Cam - The turn signal
cancel cam is integral to the steering column clock-
spring, which is located beneath the shrouds on the
top of the steering column.
• Turn Signal Indicators - The two turn signal
indicators are integral to the ElectroMechanical
Instrument Cluster (EMIC) located in the instrument
panel.
• Turn Signal Lamps - The front turn signal
lamps are integral to the front park/turn signal
lamps located beside each headlamp on the front
fender. The rear turn signal lamps are integral to the
back-up/brake/rear turn signal/tail lamps located on
either side of the rear of the quarter panels.
• Turn Signal Switch - The turn signal switch is
integral to the left multi-function switch. The left
multi-function switch control stalk actuates the turn
signal switch in the steering column.
The turn signal system in this vehicle includes a
turn signal-on warning chime feature. The EMIC
electronic circuitry monitors the turn signal indica-
tors as well as electronic vehicle speed and distance
messages received from the PCM over the PCI data
bus network to provide this feature. If an indicator
remains illuminated continuously with the vehicle
speed above about 25 kilometers per hour (15 miles
per hour) for a distance of greater than about 1.6
kilometers (1 mile), the EMIC generates a chime
through an integral chime tone generator (The dis-
tance is greater for export vehicles).
Hard wired circuitry connects the turn signal and
hazard warning system components to each other
through the electrical system of the vehicle. Refer to
the appropriate wiring information.
8L - 2
LAMPS/LIGHTING - EXTERIOR
TJ
OPERATION - TURN SIGNAL & HAZARD
WARNING SYSTEM
The turn signal system operates on battery voltage
received on a ignition switch output (run) circuit so
that the turn signals will only operate with the igni-
tion switch in the On position. The hazard warning
system operates on non-switched battery voltage so
that the hazard warning remains operational regard-
less of the ignition switch position. When the turn
signal switch control stalk is moved up or down, the
turn signal system is activated. When the turn signal
system is activated, the circuitry of the turn signal
switch and the combination flasher will cause the
selected turn signal indicator, front park/turn signal
lamp, front side marker lamp, repeater lamps, and
rear tail/stop/turn signal lamp to flash on and off.
When the hazard warning system is activated, the
circuitry of the hazard warning switch and the com-
bination flasher will cause both the right side and
the left side turn signal indicators, front park/turn
signal lamps, front side marker lamps, repeater
lamps and rear tail/stop/turn signal lamps to flash on
and off.
In order to provide the turn signal-on warning, the
ElectroMechanical Instrument Cluster (EMIC) moni-
tors vehicle speed and distance messages received
from the PCM over the PCI data bus and the hard
wired turn signal switch input to the cluster elec-
tronic circuit board. If a turn signal remains indi-
cated for a distance of greater than about 1.6
kilometers (1 mile) and the vehicle speed remains
greater than about 24 kilometers-per-hour (15 miles-
per-hour), the EMIC generates a repetitive chime at
a slow rate to provide an audible reminder that a
turn signal has been left on (distance is slightly
longer with export vehicles). Once the warning chime
begins to sound, it will continue until the turn signal
is cancelled, until the vehicle speed falls below about
24 kilometers-per-hour (15 miles-per-hour), or until
the ignition switch is turned to the Off position,
whichever occurs first. This feature is not activated
by a hazard warning input to the instrument cluster.
During both the turn signal and the hazard warn-
ing operation, if the exterior lamps are turned Off,
the front park/turn signal lamps, repeater lamps and
the front side marker lamps will flash in unison. If
the exterior lamps are turned On, the front park/turn
signal lamps, repeater lamps and the front side
marker lamps will flash alternately.
WARNING
WARNING:: EYE PROTECTION SHOULD BE USED
WHEN SERVICING GLASS COMPONENTS. PER-
SONAL INJURY CAN RESULT.
CAUTION: Do not touch the glass of halogen bulbs
with fingers or other possibly oily surface, reduced
bulb life will result.
CAUTION: Do not use bulbs with higher candle
power than indicated in the Bulb Application table
at the end of this group. Damage to lamp and/or
Daytime Running Lamp Module can result.
CAUTION: Do not use fuses, circuit breakers, or
relays having greater amperage values than indi-
cated on the fuse panel or in the Owner’s Manual.
NOTE: When it is necessary to remove components
to service another, it should not be necessary to
apply excessive force or bend a component to
remove it. Before damaging a trim component, ver-
ify hidden fasteners or captured edges are not hold-
ing the component in place.
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - TURN SIGNAL &
HAZARD WARNING SYSTEM
Always begin any diagnosis by testing all of the
fuses and circuit breakers in the system. Refer to the
appropriate wiring information.
When diagnosing the turn signal or hazard warn-
ing circuits, remember that high generator output
can burn out bulbs rapidly and repeatedly. If this is a
problem on the vehicle being diagnosed (Refer to 8 -
ELECTRICAL/CHARGING
-
DIAGNOSIS
AND
TESTING). If the problem being diagnosed is related
to a failure of the turn signals to automatically can-
cel following completion of a turn, inspect the multi-
function switch for a faulty or damaged cancel
actuator and inspect the turn signal cancel cam lobes
on
the
clockspring
mechanism
for
damage
or
improper installation. For complete circuit diagrams,
refer to the appropriate wiring information.
TJ
LAMPS/LIGHTING - EXTERIOR
8L - 3
LAMPS/LIGHTING - EXTERIOR (Continued)
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
CONDITION
POSSIBLE CAUSES
CORRECTION
ONE TURN SIGNAL LAMP
DOES NOT ILLUMINATE
1. Faulty or missing bulb
1. Test and replace turn signal
bulb as required.
2. Faulty ground circuit.
2. Test and repair open ground
circuit
3. Faulty signal circuit.
3. Test and repair open right or
left turn signal circuit.
ALL RIGHT SIDE AND/OR
LEFT SIDE TURN SIGNAL
LAMPS DO NOT FLASH
1. Faulty multifunction switch.
1. Test and replace the
multifunction switch as required.
2. Faulty flasher.
2. Replace the hazard
switch/combination flasher.
ALL RIGHT SIDE OR LEFT
SIDE TURN SIGNALS
FLASH RAPIDLY
1. Faulty or missing bulb.
1. Test and replace faulty bulb
as required.
2. Faulty ground circuit.
2. Test and repair open ground
circuit as required.
3. Faulty signal circuit.
3. Test and repair high
resistance or open signal circuit
as required.
4. Faulty flasher.
4. Replace flasher.
HAZARD WARNING
LAMPS DO NOT FLASH
1. Faulty or missing fuse.
2. Test and replace fuse as
required.
2. Faulty ground circuit.
2. Test and repair high
resistance or open ground
circuit.
3. Open battery positive voltage
circuit to hazard warning switch.
3. Test and repair open battery
voltage circuit to hazard
warning switch.
4. Faulty flasher
4. Replace flasher
5. Faulty multifunction switch.
5. Test and replace the
multifunction switch as required.
DIAGNOSIS AND TESTING - HEADLAMP
SYSTEM
Always begin any diagnosis by testing all of the
fuses and circuit breakers in the system. Refer to the
appropriate wiring information.
8L - 4
LAMPS/LIGHTING - EXTERIOR
TJ
LAMPS/LIGHTING - EXTERIOR (Continued)
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