2008 JEEP WRANGLER ignition

Spare Tire Stowage
To remove the spare tire from the carrier, remove the tire
cover, if equipped, and remove the lug nuts with the lug
wrench turning them counterclockwise.
NOTE:If you have added aftermarket accessories to the
spare tire mounted carrier, it cannot exceed a gross
weight of 50 lbs (23 kg) including the weight of the spare
tire.
Preparations For Jacking
Park on a firm level surface, avoid ice or slippery areas,
set the parking brake and shift automatic transmission
into PARK, or manual transmission into REVERSE. Turn
OFF the ignition.
WARNING!
Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off
the road to avoid being hit when operating the jack
or changing the wheel.
•Turn on the hazard warning flashers. Refer to “Hazard
Warning Flashers” in this section.
•Block both the front and rear
of the wheel diagonally oppo-
site of the jacking position.
For example, if changing the
right front tire, block the left
rear wheel.
•Passengers should not remain in the vehicle when the
vehicle is being jacked.
WHAT TO DO IN EMERGENCIES 367
6

2. Park the booster vehicle within cable reach but with-
out letting the vehicles touch. Set the parking brake on
both vehicles, shift the automatic transmission into
PARK, or the manual transmission into NEUTRAL, and
turn the ignition OFF.
3. Turn off the heater, radio, and all unnecessary electri-
cal loads.
4. Connect one end of a jumper cable to the positive
terminal of the booster battery. Connect the other end of
the same cable to the positive terminal of the discharged
battery.
WARNING!
Do not permit vehicles to touch each other as this
could establish a ground connection and personal
injury could result.5. Connect the other cable, first to the negative terminal
of the booster battery and then to the engine of the
vehicle with the discharged battery. Make sure you have
a good contact on the engine.
6. Start the engine in the vehicle which has the booster
battery, let the engine idle a few minutes, then start the
engine in the vehicle with the discharged battery.
7. When removing the jumper cables, reverse the above
sequence exactly. Be careful of the moving belts and fan.
372 WHAT TO DO IN EMERGENCIES

Your vehicle has a simple ignition key-actuated test,
which you can use prior to going to the test station. To
check if your vehicle’s OBD II system is ready, you must
do the following:
1. Insert your ignition key into the ignition switch.
2. Turn the ignition to the ON position, but do not crank
or start the engine.
3. If you crank or start the engine, you will have to start
this test over.
4. As soon as you turn your key to the ON position, you
will see the MIL symbol come on as part of a normal bulb
check.
5. Approximately 15 seconds later, one of two things will
happen:a. The MIL will flash for about 10 seconds and then
return to being fully illuminated until you turn OFF the ignition key or start the engine. This means that
your vehicle’s OBD II system is
not readyand you
should notproceed to the I/M station.
b. The MIL will not flash at all and will remain fully
illuminated until you turn OFF the ignition key or start
the engine. This means that your vehicle’s OBD II
system is ready, and you can proceed to the I/M
station.
If your OBD II system is not ready,you should see your
authorized dealer or repair facility. If your vehicle was
recently serviced or had a battery failure or replacement,
you may need to do nothing more than drive your
vehicle as you normally would in order for your OBD II
system to update. A recheck with the above test routine
may then indicate that the system is now ready.
Regardless of whether your vehicle’s OBD II system is
ready or not ready, if the MIL is illuminated during
normal vehicle operation, you should have your vehicle
MAINTAINING YOUR VEHICLE 381
7

To minimize the possibility of catalytic converter dam-
age:
•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing.
•Do not idle the engine for prolonged periods during
very rough idle or malfunctioning operating condi-
tions.
•Do not allow vehicle to run out of fuel.NOTE:
Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!
Check ventilation hose for indication of damage or
plugging deposits. Replace if necessary.
Fuel Filter
A plugged fuel filter can cause hard starting or limit the
speed at which a vehicle can be driven. Should an
excessive amount of dirt accumulate in the fuel tank,
frequent replacement of the fuel filter which is mounted
in the fuel tank may be necessary.
388 MAINTAINING YOUR VEHICLE

Cavity CartridgeFuseMini
Fuse Description
J4 25 Amp Natural Driver Door Node
J5 25 Amp Natural Passenger Door Node
J6 40 Amp Green Anti-Lock Brake System
(ABS) Pump Feed/ESP
J7 30 Amp Pink Anti-Lock Brake System
(ABS) Valve Feed/ESP
J8 — —
J9 40 Amp Green PZEV Sec Motor Feed/
Flex Fuel
J10 30 Amp Pink Headlamp Wash Relay/
Manifold Tuning Valve
J11 30 Amp Pink Sway BarCavity Cartridge
FuseMini
Fuse Description
J13 60 Amp Yellow Ignition Off Draw
(IOD) — Main
J14 40 Amp Green EBL (Rear Window De-
fogger)
J15 30 Amp Pink Rear Blower
J17 40 Amp Green Starter Solenoid
J18 20 Amp Yellow Powertrain Control
Module (PCM) Trans
Range
J19 60 Amp Yellow Radiator Fan
J20 30 Amp Pink Front Wiper LO/HI
414 MAINTAINING YOUR VEHICLE

Cavity CartridgeFuseMini
Fuse Description
J21 20 Amp Yellow Front/Rear Washer
J22 — Spare
M1 15 Amp
Blue Center High-Mounted
Stop Light (CHMSL)/
Switch Stop Lamp Feed
M2 20 Amp
Yellow Relay Trailer Lighting
(Stop)
M3 20 Amp
Yellow Frt/Rear Axle Locker
Relay
M4 — —
M5 — —
M6 20 Amp
Yellow Power Outlet #1/Rain
Sensor
M7 20 Amp
Yellow Power Outlet #2
(BATT/ACC SELECT)Cavity Cartridge
FuseMini
Fuse Description
M8 20 Amp
Yellow Front Heated Seat
M9 20 Amp
Yellow Rear Heated Seat (If
Equipped)
M10 20 Amp
Yellow Ignition Off Draw —
Vehicle Entertainment
System (IOD-VES), Sat-
ellite Digital Audio Re-
ceiver (SDARS), DVD,
Hands-Free Module
(HFM), RADIO, An-
tenna (ANT), Universal
Garage Door Opener
(UGDO), Vanity Lamp
(VANITY LP)
MAINTAINING YOUR VEHICLE 415
7

Cavity CartridgeFuseMini
Fuse Description
M11 10 Amp
Red (Ignition Off Draw)
IOD-HVAC/ATC, MW
SENSR, Underhood
Lamp (UH LMP)
M12 30 Amp GreenAmplifier (AMP)
M13 20 Amp YellowIgnition Off Draw—
Cabin Compartment
Node (IOD-CCN),
Wireless Control Mod-
ule (WCM), SIREN,
Multifunction Control
Switch (MULTIFCTN
SW)
M14 20 Amp YellowTrailer Tow (Export
Only)Cavity Cartridge
FuseMini
Fuse Description
M15 20 Amp
Yellow COL MOD, IR SNS,
Heater Ventilation, Air
Conditioning/
Automatic Temperature
Control (HVAC/ATC),
Rear View Mirror (RR
VW MIR), Cabin Com-
partment Node (CCN),
Transfer Case Switch
(T-CASE SW), RUN/ST,
Multi-Function Control
Switch (MULTIFTCN
SW), Tire Pressure
Monitor (TPM), Glow
Plug Module (GLW
PLG MOD) — Export
Diesel Only
416 MAINTAINING YOUR VEHICLE

Cavity CartridgeFuseMini
Fuse Description
M16 10 Amp
Red Occupant Restraint
Controller (ORC)
M17 15 Amp
Blue Left Tail/License/Park
Lamp (LT-TAIL/LIC/
PRK LMP)
M18 15 Amp
Blue Right Tail/Park/Run
Lamp (RT-TAIL/PRK/
RUN LMP)
M19 25 Amp
Natural Auto Shut Down (ASD
#1 and #2)
M20 15 Amp
Blue Cabin Compartment
Node Interior Light
(CCN INT LIGHT),
Switch Bank (SW
BANK)
M21 20 Amp
Yellow Auto Shut Down (ASD
#3)Cavity Cartridge
FuseMini
Fuse Description
M22 10 Amp
Red Right Horn (RT HORN
(HI/LOW)
M23 10 Amp
Red Left Horn (LT HORN
(HI/LOW)
M24 25 Amp
Natural Rear Wiper (REAR
WIPER)
M25 20 Amp
Yellow Fuel Pump (FUEL
PUMP), Diesel Lift
Pump (DSL LIFT
PUMP) — Export Only
M26 — —
M27 10 Amp
Red Ignition Switch Feed,
Wireless Module
M28 10 Amp
Red PCM Feed/TCM
M29 — —
MAINTAINING YOUR VEHICLE 417
7