2004 JEEP WRANGLER Owners Manual

Set the parking brake, place an automatic transmission in
P (Park) (or N (Neutral) for a manual transmission). Turn
off lights, heater, and other electrical loads. Observe
charge indicator in the battery. If indicator is light or
yellow, replace the battery.
CAUTION!
Use the ªJump Startingº procedure only when the
charge indicator is dark in the center. Do not attempt
jump starting when the battery charge indicator is
bright or yellow. If the charge indicator is dark and
has a green dot in the center, failure to start is not
due to a discharged battery and the cranking system
should be checked.
1. Attach one end of the jumper cable to the positive
terminal of the discharged battery and the other end of
the same cable to the positive terminal of the booster
battery.
WARNING!
Do not permit vehicles to touch each other as this
could establish a ground connection and personal
injury could result.
2. Connect one end of the other jumper cable to the
negative terminal of the booster battery. Connect the
other end of the jumper cable to a good ground on the
vehicle with the discharged battery. Make sure a good
connection is made, free of dirt and grease.
WHAT TO DO IN EMERGENCIES 217
6

WARNING!
²Do not connect the cable to the negative terminal
of the discharged battery. The resulting electrical
spark could cause the battery to explode.
²During cold weather when temperatures are be-
low freezing point, electrolyte in a discharged
battery may freeze. Do not attempt jump starting
because the battery could rupture or explode. The
battery temperature must be brought up above
freezing point before attempting to jump start.
3. Take care that the clamps from one cable do not touch
clamps from the other cable. Do not lean over the battery
when making the connection. The negative connection
must provide good electrical conductivity and current
carrying capacity.4. After the engine is started or if the engine fails to start,
the cables must be disconnected in the following order:
a. Disconnect the negative cable at the engine
ground.
b. Disconnect the negative cable at the negative
terminal on the booster battery.
c. Disconnect the cable from the positive terminals
of both batteries.
WARNING!
Any procedure other than above could result in:
²Personal injury caused by electrolyte squirting
out the battery vent.
²Personal injury or property damage due to battery
explosion.
²Damage to charging system of booster vehicle or
of immobilized vehicle.
218 WHAT TO DO IN EMERGENCIES

TOWING A DISABLED VEHICLE
The manufacturer recommends towing with all four
wheels off the ground. Acceptable methods are to tow the
vehicle on a flatbed or with one end of the vehicle raised
and the other end on a towing dolly.
WHAT TO DO IN EMERGENCIES 219
6

MAINTAINING YOUR VEHICLE
CONTENTS
m2.4L Engine..........................223
m4.0L Engine..........................224
mOnboard Diagnostic System Ð OBD II......225
mEmissions Inspection And
Maintenance Programs
..................226
mReplacement Parts.....................227
mDealer Service........................227
mMaintenance Procedures.................228
NEngine Oil..........................228
NDrive Belts Ð Check Condition And Tension . . 231
NSpark Plugs.........................232
NCatalytic Converter....................232NEngine Timing Belt Ð 2.4L Engine.........233
NIgnition Wiring System Ð 2.4L Engine......233
NCrankcase Emission Control System........234
NFuel Filter..........................234
NEngine Air Cleaner Filter................234
NMaintenance-Free Battery................234
NAir Conditioner Maintenance.............235
NPower Steering Fluid Check..............236
NDriveline And Steering Component
Lubrication..........................237
NBody Lubrication.....................237
NWindshield Wiper Blades................237
7

NWindshield Washers...................238
NExhaust System......................238
NCooling System.......................239
NHoses And Vacuum/Vapor Harnesses.......242
NBrake System........................243
NAutomatic Transmission................245
NHydraulic Clutch Fluid Ð
Manual Transmission..................246
NManual Transmission..................246
NTransfer Case........................247
NFront/Rear Axle Fluid..................248
NAppearance Care And Protection
From Corrosion......................248mFuse Panel...........................254
NInterior Fuses........................254
NUnderhood Fuses
(Power Distribution Center)..............256
mVehicle Storage........................256
mReplacement Bulbs Ð If Equipped.........257
mFluid Capacities.......................258
mRecommended Fluids, Lubricants And
Genuine Parts
.........................259
NEngine.............................259
NChassis............................260
222 MAINTAINING YOUR VEHICLE

2.4L ENGINE
MAINTAINING YOUR VEHICLE 223
7

4.0L ENGINE
224 MAINTAINING YOUR VEHICLE