2008 JEEP GRAND CHEROKEE wiring

WARNING!
²Relying on the airbags alone could lead to more
severe injuries in a collision. The airbags work
with your seat belt to restrain you properly. In
some collisions the airbags won't deploy at all.
Always wear your seat belts even though you have
airbags.
²Being too close to the steering wheel or instrument
panel during airbag deployment could cause seri-
ous injury. Airbags need room to inflate. Sit back,
comfortably extending your arms to reach the
steering wheel or instrument panel.
²Side curtain airbags need room to inflate. Do not
lean against the door or window. Sit upright in the
center of the seat.
Airbag System Components
The airbag system consists of the following:
²Occupant Restraint Control Module
²Airbag Warning Light
²Driver Airbag
²Passenger Airbag
²Side Curtain Airbags above Side Windows
²Side Remote Acceleration Sensors
²Driver Side Seat Track Position Sensor
²Steering Wheel and Column
²Instrument Panel
²Interconnecting Wiring
²Knee Impact Bolsters
²Front Acceleration Sensors
²Driver and Front Passenger Seat Belt Pretensioners
50 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Maintaining Your Airbag System
WARNING!
²Modifications to any part of the airbag system could
cause it to fail when you need it. You could be
injured if the airbag system is not there to protect
you. Do not modify the components or wiring,
including adding any kind of badges or stickers to
the steering wheel hub trim cover or the upper right
side of the instrument panel. Do not modify the
front bumper or vehicle body structure.
²You need proper knee impact protection in a
collision. Do not mount or locate any aftermarket
equipment on or behind the knee bolsters.
²It is dangerous to try to repair any part of the
airbag system yourself. Be sure to tell anyone who
works on your vehicle that it has an airbag system.NOTE:
Perchlorate Material ± special handling may ap-
ply, See www.dtsc.ca.gov/hazardouswaste/perchlorate
Airbag Warning Light
You will want to have the airbag system ready to inflate
for your protection in an impact. The airbag system is
designed to be maintenance free. If any of the following
occurs, have an authorized dealer service the system
promptly:
²Does not come on during the 2.5 to 8 seconds after the
ignition switch is first turned on.
²Remains on after the 2.5 to 8 second interval.
²Flickers, or comes on and remains on for any period of
time while driving.
NOTE:If the speedometer, tachometer, or any engine
related gauges are not working, the airbag control mod-
ule may also be disabled. The airbags may not be ready
to inflate for your protection. Promptly check the fuse
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 55
2

þAn electronically actuated trailer brake controller is
required when towing a trailer with electronically
actuated brakes. When towing a trailer equipped with
a hydraulic surge actuated brake system, an electronic
brake controller is not required.
þTrailer brakes are recommended for trailers over 1,000
lbs (454 kg) and required for trailers in excess of 2,000
lbs (907 kg).
CAUTION!
If the trailer weighs more than 1,000 lbs (454 kg)
loaded, it should have its own brakes and they
should be of adequate capacity. Failure to do this
could lead to accelerated brake lining wear, higher
brake pedal effort, and longer stopping distances.
WARNING!
Do not connect trailer brakes to your vehicle's hy-
draulic brake lines. It can overload your brake sys-
tem and cause it to fail. You might not have brakes
when you need them and could have an accident.
Towing any trailer will increase your stopping dis-
tance. When towing you should allow for additional
space between your vehicle and the vehicle in front
of you. Failure to do so could result in an accident.
Towing Requirements Ð Trailer Lights & Wiring
Whenever you pull a trailer, regardless of the trailer size,
stop lights and turn signals on the trailer are required for
motoring safety.
STARTING AND OPERATING 361
5

The Trailer Tow Package may includea4and7pin
wiring harness. Use a factory approved trailer harness
and connector.
The electrical connections are all complete to the vehicle
but you must mate the harness to a trailer connector.
Refer to the following illustrations.
Towing Tips
Before setting out on a trip, practice turning, stopping
and backing the trailer in an area away from heavy
traffic.
4 - Pin Connector
7- Pin Connector
362 STARTING AND OPERATING

General Information...............20,26,108,336
Glass Cleaning.......................... 425
Glow Plug Light........................ 196
Gross Axle Weight Rating.................. 352
Gross Vehicle Weight Rating................ 351
GVWR............................... 348
Hands-Free Phone (UConnectŸ).............. 81
Hard Drive (HDD)....................... 241
Hazard Warning Flasher................... 370
Head Restraints......................... 111
Head Rests............................ 111
Headlights..........................124,435
Bulb Replacement...................... 436
Cleaning............................ 425
On With Wipers....................... 125
Replacing............................ 436
Heated Mirrors.......................... 80
Heated Seats........................ 111,113Heater, Engine Block..................... 283
High Beam Indicator..................... 188
High Beam/Low Beam Select (Dimmer) Switch . . 128
Hill Descent Control..................... 149
Hill Start Assist......................... 147
Hitches
Trailer Towing........................ 354
Holder, Cup........................... 171
HomeLinkt(Garage Door Opener) Transmitter . . . 158
Hood Release.......................... 122
Hoses................................ 412
Ignition............................... 16
Cables (Spark Plug Wires)................ 398
Key ...............................14,16
Wiring System (Spark Plug Wires).......... 398
Ignition Key Removal..................... 16
Illuminated Entry........................ 21
Immobilizer (Sentry Key)................... 17
INDEX 477
10

Traction Control Light.................... 190
Trailer Sway Control (TSC)................. 146
Trailer Towing.......................... 351
Cooling System Tips.................... 363
Hitches............................. 354
Minimum Requirements................. 358
Trailer and Tongue Weight................ 357
Wiring.............................. 361
Trailer Towing Guide..................... 355
Trailer Weight.......................... 355
Transfer Case........................... 416
Maintenance.......................... 416
Transmission
Automatic........................285,417
Maintenance.......................... 417
Range Indicator....................... 195
Shifting............................. 284
Transmitter Battery Service (Remote Keyless
Entry)................................. 25Transmitter, Garage Door Opener (HomeLinkt) . . 158
Transmitter Programming (Remote Keyless
Entry)................................. 21
Transmitter, Remote Keyless Entry (RKE)........ 21
Tread Wear Indicators.................... 322
Turn Signals...................128,188,437,438
UCI Connector......................... 246
UConnectŸ (Hands-Free Phone).............. 81
Underhood Fuses.....................429,432
Uniform Tire Quality Grades................ 466
Universal Consumer Interface (UCI) Connector . . . 246
Universal Serial Bus (USB) Port.............. 241
Universal Transmitter..................... 158
Upholstery Care........................ 424
USB Port.............................. 241
Vacuum/Vapor Harnesses................. 412
Vanity Mirrors........................... 80
488 INDEX

Variance, Compass....................... 205
Vehicle Identification Number (VIN)............ 8
Vehicle Loading......................315,348
Vehicle Modifications/Alterations.............. 9
Vehicle Storage.......................269,433
Video Entertainment System (Rear Seat Video
System)............................... 254
Viscosity, Engine Oil...................... 396
Warning Flasher, Hazard.................. 370
Warning, Roll Over........................ 5
Warnings and Cautions..................... 8
Warranty Information..................... 463
Washer, Adding Fluid..................... 178
Washers, Windshield..................129,405
Washing Vehicle......................... 422
Waxing and Polishing..................... 422
Wheel Alignment and Balance............... 324Wheel and Wheel Trim.................... 423
Wheel and Wheel Trim Care................ 423
Wheel Mounting........................ 377
Wind Buffeting.......................33,167
Window Fogging........................ 268
Windows.............................. 31
Power............................... 31
Windshield Defroster................70,259,266
Windshield Washers...................... 129
Fluid............................... 405
Windshield Wiper Blades.................. 405
Windshield Wipers....................... 129
Wipers, Intermittent...................... 131
Wipers, Rain Sensitive.................... 131
Wiring, Ignition (Spark Plug Wires)........... 398
YES EssentialstFabric Cleaning Procedure...... 423
INDEX 489
10