2023 JEEP WRANGLER clock

SERVICING AND MAINTENANCE321
DRAINING FUEL/WATER SEPARATOR
F
ILTER — DIESEL ENGINE
The fuel/water separator housing is located inside the left
frame rail in front of the fuel tank. The best access to this
water drain valve is from under the vehicle.
If necessary remove the fuel filter protective cover to
access the water drain valve.

Fuel/Water Separator Filter

If water is detected in the water separator while the engine
is running, or while the ignition switch is in the ON position,
the Water In Fuel Indicator Light will illuminate and an
audible chime will be heard. At this point you should stop
the engine and drain the water from the filter housing.

Fuel/Water Separator Filter

Within 10 minutes of vehicle shutdown, turn the filter
drain valve (located on the bottom of the filter housing)
counterclockwise to drain fuel/water; allow the
accumulated water to drain. Leave the drain valve open
until all water and contaminants have been removed.
When clear fuel is visible, close the drain valve by turning
it clockwise.
Upon proper draining of the water from fuel filter
assembly, the Water In Fuel Indicator Light will remain
illuminated for approximately 10 seconds. If the water was
drained while the engine was running, the Water In Fuel
Indicator Light may remain on for approximately three
minutes.
NOTE:Care should be taken in disposing of used fluids from your
vehicle. Used fluids, indiscriminately discarded, can
present a problem to the environment. Contact an autho-
rized dealer, service station, or government agency for
advice on recycling programs and for where used fluids
and filters can be properly disposed of in your area.
If more than two ounces or 60 ml of fuel have been
drained, follow the directions for Priming If The Engine Has
Run Out Of Fuel
Úpage 323.
FUEL FILTER REPLACEMENT — DIESEL
E
NGINE
NOTE:Using a fuel filter that does not meet the manufacturer’s
filtration and water separating requirements can severely
impact fuel system life and reliability. We recommend you
use Mopar® Fuel Filter. Must meet 3 micron rating.
CAUTION!
 Do not drain the fuel/water separator filter when the
engine is running.
 Diesel fuel will damage blacktop paving surfaces.
Drain the filter into an appropriate container.
1 — Retainers
2 — Fuel Filter Protective Cover
1 — Water In Fuel Drain Valve
CAUTION!
 Diesel fuel will damage blacktop paving surfaces.
Drain the filter into an appropriate container.
 Do not prefill the fuel filter when installing a new fuel
filter. There is a possibility debris could be introduced
into the fuel filter during this action. It is best to
install the filter dry and allow the in-tank lift pump to
prime the fuel system.8

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322SERVICING AND MAINTENANCE

1. Ensure engine is turned off.

2. Remove the fuel filter protective cover to access the
fuel filter assembly.

Fuel Filter Assembly

3. Place drain pan under the fuel filter assembly.
4. Open the water drain valve, and let any accumulated water and fuel drain.
5. Close the water drain valve.

Fuel Filter Assembly

6. Wipe clean the underside of the filter housing to prevent contamination from entering fuel system
during service.
7. Remove the fuel filter cap and filter from the housing using a socket. Rotate counterclockwise for removal.

Fuel Filter Assembly

8. Remove the used fuel filter cartridge from the cap and dispose of according to your local regulations.
9. Wipe clean the sealing surfaces of the cap and housing.
1 — Retainers
2 — Fuel Filter Protective Cover
1 — Water Drain Valve1 — Fuel Filter Cap
2 — Socket Adapter
CAUTION!
Take care when handling the new fuel filter to prevent
contamination from entering the fuel system.

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SERVICING AND MAINTENANCE323
10. Lubricate o-ring on the cap with clean engine oil.
11. Install the new fuel filter cartridge onto the cap.
12. Insert the cap and filter into the housing with
clockwise rotation, use a socket to tighten.
13. Push the ignition switch twice without your foot on the brake to place vehicle in RUN position. This will
activate the in tank fuel pump for approximately 30
seconds. Repeat this process twice to prime the fuel
system. Start the engine using the Normal Starting
procedure. After engine start, verify the fuel filter cap
does not leak.
PRIMING IF THE ENGINE HAS RUN OUT
O
F FUEL — DIESEL ENGINE

1. Add a substantial amount of fuel to the tank, approx -
imately 2 to 5 gal (8L to 19L).

2. Push ignition switch twice without your foot on brake to put vehicle in RUN position. This will activate the in
tank fuel pump for approximately 30 seconds.
Repeat this process twice to prime the fuel system.
3. Start the engine using the Normal Starting procedure
Úpage 130.
NOTE:The engine may run rough until the air is forced from all
the fuel lines.
NOTE:
 Use of biodiesel mixture in excess of 20% can nega -
tively impact the fuel filter's ability to separate water
from the fuel, resulting in high pressure fuel system
corrosion or damage.
 In addition, commercially available fuel additives are
not necessary for the proper operation of your diesel
engine.
 For extreme cold conditions, "Mopar® Premium Diesel
Fuel Treatment" is recommended to assist with cold
starting.
INTERVENTION REGENERATION
S
TRATEGY — MESSAGE PROCESS FLOW
This engine meets all required diesel engine emissions
standards. To achieve these emissions standards, your
vehicle is equipped with a state-of-the-art engine and
exhaust system. These systems are seamlessly integrated
into your vehicle and managed by the Powertrain Control
Module (PCM). The PCM manages engine combustion to
allow the exhaust system’s catalyst to trap and burn
Particulate Matter (PM) pollutants, with no input or
interaction on your part.
Additionally, your vehicle has the ability to alert you to
additional maintenance required on your vehicle or
engine.
Refer to Instrument Cluster Display for further information
Úpage 108.
DIESEL EXHAUST FLUID
Diesel Exhaust Fluid (DEF) sometimes known simply by
the name of its active component, UREA—is a key
component of Selective Catalytic Reduction (SCR)
systems, which help diesel vehicles meet stringent
emission regulations. DEF is a liquid reducing agent that
WARNING!
Do not open the high pressure fuel system with the
engine running. Engine operation causes high fuel
pressure. High pressure fuel spray can cause serious
injury or death.
CAUTION!
The starter motor will engage for approximately
30 seconds at a time. Allow two minutes between
cranking intervals.
WARNING!
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and be
hazardous or explosive when mixed with diesel fuel.
CAUTION!
Due to lack of lubricants in alcohol or gasoline, the use
of these fuels can cause damage to the fuel system.WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be grass
or leaves coming into contact with your exhaust system.
Do not park or operate your vehicle in areas where your
exhaust system can contact anything that can burn.
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SERVICING AND MAINTENANCE343
Bulb Replacement
NOTE:Lens fogging can occur under certain atmospheric condi -
tions. This will usually clear as atmospheric conditions
change to allow the condensation to change back into a
vapor. Turning the lamps on will usually accelerate the
clearing process.
HALOGEN HEADLAMPS
See the following steps to replace:

1. Open hood and support using prop rod.

2. Remove the front grille. Turn the retainers along the top a quarter turn counterclockwise and remove. 3. Pull the bottom of the grille away starting at one side
and working toward the other.
4. Remove the three screws holding the headlamp to the vehicle.
5. Remove lamp from the vehicle.
6. Remove the lamp from the collar.
7. Grab the bulb and rotate a quarter turn counter -
clockwise.
8. Pull the bulb from the housing.
9. Push connector locking tab to the unlock position.
10. Remove connector from bulb.
11. Push connector onto new bulb base, and push the connector locking tab to the lock position. 12. Reinstall bulb housing. Rotate the bulb a quarter turn
clockwise.
Premium Fog Lamps
LED
Rear Premium LED Tail Lamps LED
Rear Base Tail Lamp Stop/Tail/Turn Bulb 3157
Rear Base Tail Lamp Backup Bulb 7440
Rear Base Tail Lamp Side Marker LED
Center High Mounted Stop Lamp (CHMSL) LED
License Lamp LED
NOTE: Numbers refer to commercial bulb types that can be purchased from an authorized dealer. If a bulb needs to be replaced, visit an authorized dealer or refer to the applicable Service
Manual.
Exterior Bulbs
Bulb Name Bulb Number
CAUTION!
Do not touch the new bulb with your fingers. Oil
contamination will severely shorten bulb life. If the bulb
comes in contact with any oily surface, clean the bulb
with rubbing alcohol.
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344SERVICING AND MAINTENANCE
FRONT PARK/TURN SIGNAL
See the following steps to replace:

1. Remove the front wheel liner fasteners to access
bulb sockets.

Wheel Liner

2. Turn the socket assembly a quarter turn counter -
clockwise and remove from housing. Pull the bulb
straight from the socket to replace.
LED FRONT SIDE MARKER
See the following steps to replace:

1. Remove the front wheel liner fasteners to access side maker screw and electrical connector.

2. Remove fastening screw in the back of the front side maker assembly and disconnect electrical connector.
3. Remove and replace LED front side marker light assembly.
HALOGEN FRONT FOG LAMP
See the following steps to replace:

1. Reach under the vehicle to access the back of the front fog lamp.

2. Disconnect the wire harness connector from the front fog lamp connector receptacle.
3. Firmly grab the bulb by the two latch features and squeeze them together to unlock the bulb from the
back of the front fog lamp housing.
4. Pull the bulb straight out from the keyed opening in the housing and then connect the replacement bulb.
LED Front Fog Lamp
If your vehicle is equipped with LED fog lamps they are
replaced as an assembly.
REAR TAIL, STOP, TURN SIGNAL, AND BACKUP
LAMP
See the following steps to replace:

1. Remove interior trim panel cap to access single retaining screw for tail lamp assembly.

Trim Cap

2. Remove retaining screw and disconnect electrical connector, then remove tail lamp assembly from the
vehicle.
NOTE:If necessary, push in on the assembly tab located inboard
behind the lamp housing.
3. Remove the three screws from assembly bracket to access bulb sockets.
CAUTION!
Do not touch the new bulb with your fingers. Oil
contamination will severely shorten bulb life. If the bulb
comes in contact with any oily surface, clean the bulb
with rubbing alcohol.

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SERVICING AND MAINTENANCE345
4. Rotate the appropriate socket a quarter turn counter -
clockwise, then remove it from the housing.

Bulb Removal

5. Pull the bulb straight from the socket to replace.
CENTER HIGH MOUNTED STOP LAMP (CHMSL)
The stop lamp is mounted on a bracket that extends
upward from the swing gate behind the spare tire. If
service is needed, obtain the LED Assembly from an
authorized dealer.
See the following steps to replace:

1. Remove the spare tire.

2. Remove the screws holding the tire carrier cover.
3. Remove two screws from lamp assembly and disconnect electrical connector.
LICENSE PLATE LAMPS
See the following steps to replace:
NOTE:To install a new bulb, reverse the procedure above. When
installing the new bulb, care should be taken to not allow
bare skin to come in contact with the bulb.
See an authorized dealer to replace LED lamps.
TIRES
TIRE SAFETY INFORMATION
Tire safety information will cover aspects of the following
information: Tire Markings, Tire Identification Numbers,
Tire Terminology and Definitions, Tire Pressures, and Tire
Loading.
NOTE:If your vehicle is equipped with bead-lock wheels, please
refer to your vehicles bead-lock specific part number for
additional information and instructions on mopar.com or
by contacting an authorized dealer.
Tire Markings

Tire Markings

1 — US DOT Safety Standards Code
(TIN)
2 — Size Designation
3 — Service Description
4 — Maximum Load
5 — Maximum Pressure
6 — Treadwear, Traction and
Temperature Grades
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