2012 JEEP GRAND CHEROKEE wiring

WARNING!
Deployed air bags and seat belt pretensioners
cannot protect you in another collision. Have
the air bags, seat belt pretensioners, and the
front seat belt retractor assemblies replaced
by an authorized dealer immediately. Also,
have the Occupant Restraint Controller
(ORC) system serviced as well.
Maintaining Your Air Bag System
WARNING!
•Modifications to any part of the air bag
system could cause it to fail when you need
it. You could be injured if the air bag 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, vehicle body structure, or add
aftermarket side steps or running boards.
(Continued)
WARNING! (Continued)
• It is dangerous to try to repair any part of
the air bag system yourself. Be sure to tell
anyone who works on your vehicle that it
has an air bag system.
• Do not attempt to modify any part of your
air bag system. The air bag may inflate
accidentally or may not function properly if
modifications are made. Take your vehicle
to an authorized dealer for any air bag
system service. If your seat including your
trim cover and cushion needs to be ser-
viced in any way (including removal or
loosening/tightening of seat attachment
bolts), take the vehicle to your authorized
dealer. Only manufacturer approved seat
accessories may be used. If it is necessary
to modify the air bag system for persons
with disabilities, contact your authorized
dealer. Air Bag Warning Light
You will want to have the air bags
ready to inflate for your protection
in a collision. The Air Bag Warning
Light monitors the internal circuits
and interconnecting wiring associ-
ated with air bag system electrical
components. While the air bag system is de-
signed to be maintenance free. If any of the
following occurs, have an authorized dealer
service the air bag system immediately.
• The Air Bag Warning Light does not come on
during the four to eight seconds when the
ignition switch is first turned to the ON/RUN
position.
• The Air Bag Warning Light remains on after
the four to eight-second interval.
• The Air Bag Warning Light comes on inter-
mittently or remains on while driving.
45

To keep the ACC System operating properly, it
is important to note the following maintenance
items:
•Always keep the sensor clean. Carefully
wipe the sensor lens with a soft cloth. Be
cautious not to damage the sensor lens.
• Do not remove any screws from the sensor.
Doing so could cause an ACC system mal-
function or failure and require a sensor re-
alignment.
• If the sensor is damaged due to a collision,
see your authorized dealer for service.
• Do not attach or install any accessories near
the sensor, including transparent material or
aftermarket grilles. Doing so could cause an
ACC system failure or malfunction.
When the condition that deactivated the system
is no longer present, the system will return to
the “Adaptive Cruise Control Off” state and will
resume function by simply reactivating it.
NOTE:
• If the “Clean Radar Sensor In Front Of
Vehicle” message occurs frequently (e.g.
more than once on every trip) without any snow, rain, mud, or other obstruction,
have the radar sensor realigned at your
authorized dealer.
• Installing a snow plow, front-end protec-
tor, an aftermarket grille or modifying the
grille is not recommended. Doing so may
block the sensor and inhibit ACC opera-
tion.
Removing ACC Sensor For Off-Roading
NOTE:
When off-roading, it may be advisable to
remove the ACC sensor. The sensor is lo-
cated behind the front lower grille in the
center of the vehicle. After removing the
lower fascia, you may remove the lower
sensor and bracket assembly.
To remove the sensor follow these instructions:
1. Unplug the connector by depressing the two
tabs on the connector and pulling it out. Do not
pull by the wiring or use any tools to remove the
connector.
2. Remove the wiring christmas tree attach-
ment from the back of the bracket. 3. Remove the two M6 fasteners that connect
the bracket to the bumper.
NOTE:
Do not change the adjustment fasteners or
pull the sensor off of the bracket. Doing so
may misalign the sensor.
Store the sensor and bracket assembly in a
safe location. The wiring and connector must
be stowed properly after the sensor and
bracket assembly is removed.
A connector plug is stowed on top of the
bumper beam. Insert the wiring connector into
the connector plug.
NOTE:
When the sensor is removed, Adaptive
Cruise Control, Normal Cruise Control, and
Forward Collision Warning will not be avail-
able. The cluster will display the warning
“ACC/FCW Unavailable - Service Radar Sen-
sor.”
To reinstall the sensor and bracket assembly
reverse the process above. The fastener torque
required to assembly the bracket back to the
beam is 6.6 ft lbs (9 Nm).
125

Towing Requirements – Tires
Proper tire inflation pressures are essential tothe safe and satisfactory operation of your
vehicle. Refer to “Tires – General Informa-
tion” in “Starting and Operating” for proper
tire inflation procedures.
Check the trailer tires for proper tire inflation pressures before trailer usage.
Check for signs of tire wear or visible tire damage before towing a trailer. Refer to
“Tires – General Information” in “Starting and
Operating” for proper inspection procedure.
When replacing tires, refer to “Tires – Gen- eral Information” in “Starting and Operating”
for proper tire replacement procedures. Re-
placing tires with a higher load carrying
capacity will not increase the vehicle’s
GVWR and GAWR limits.
Towing Requirements – Trailer Brakes
Do notinterconnect the hydraulic brake sys-
tem or vacuum system of your vehicle with
that of the trailer. This could cause inad-
equate braking and possible personal injury. An electronically-actuated trailer brake con-
troller 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.
Trailer brakes are recommended for trailers over 1,000 lbs (454 kg), and required for
trailers in excess of 1,654 lbs (750 kg).
WARNING!
• Do not connect trailer brakes to your vehi-
cle’s hydraulic brake lines. It can overload
your brake system 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 stop-
ping distance. 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 – Trailer Lights And
Wiring
Whenever you pull a trailer, regardless of the
trailer size, stop lights and turn signals on the
trailer are required for motoring safety.
The Trailer Tow Package includes a 13 pin
wiring harness. Use a factory approved trailer
harness and connector.
NOTE:
Do not cut or splice wiring into the vehicles
wiring harness.
The electrical connections are all complete to
the vehicle but you must mate the harness to a
trailer connector.
272

WARNING!
A transient high voltage occurs at the bulb
sockets of High Intensity Discharge (HID)
headlamps when the headlamp switch is
turned ON. It may cause serious electrical
shock or electrocution if not serviced properly.
See your authorized dealer for service.
NOTE:
On vehicles equipped with High Intensity
Discharge (HID) headlamps, when the head-
lamps are turned on, there is a blue hue to
the lamps. This diminishes and becomes
more white after approximately 10 seconds,
as the system charges.
Halogen Headlamps – If Equipped
1. Open the hood.
2. Turn the low or high beam bulb one–quarter
turn counterclockwise to remove from housing.
3. Disconnect the electrical connector and re-
place the bulb.
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.
Front Turn Signal
1. Open the hood.
2. Turn the turn signal bulb one–quarter turn
counterclockwise to remove from housing.
3. Disconnect the electrical connector and re-
place the bulb.
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.
Front Fog Lamps
1. Reach through the cutout in the splash
shield and disconnect the wiring harness from
the fog lamp connector. 2. Firmly grasp the bulb by the two latches and
squeeze them together to unlock the bulb from
the back of the front fog lamp housing.
3. Pull the bulb straight out from the keyed
opening in the housing.
CAUTION!
•
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the bulb
with rubbing alcohol.
• Always use the correct bulb size and type
for replacement. An incorrect bulb size or
type may overheat and cause damage to
the lamp, the socket or the lamp wiring.
4. Align the index tabs of the front fog lamp
bulb with the slots in the collar of the bulb
opening on the back of the front fog lamp
housing.
5. Insert the bulb into the housing until the
index tabs are engaged in the slots of the collar.
323

6. Firmly and evenly push the bulb straight into
the lamp housing until both tabs snap firmly
into place and are fully engaged.
7. Connect the wiring harness to the front fog
lamp connector.
Rear Tail, Stop, and Turn Signal
Lamps
1. Raise the liftgate.
2. Remove the two push-pins from the tail lamp
housing.3. Grasp the tail lamp and pull firmly rearward
to disengage the lamp from the aperture panel.
4. Twist socket counter clockwise and remove
from lamp.
5. Pull the bulb to remove it from the socket.
6. Replace the bulb, reinstall the socket, and
reattach the lamp assembly.Rear Liftgate Mounted Tail Lamp
1. Raise the liftgate.
2. Use a fiber stick or flat blade screw driver to
pry the lower trim from the liftgate.
3. Once lower trim is loose, close the liftgate.
4. Open the flipper glass.
5. Pull up glass seal at bottom of window
opening.
6. Remove small trim panel around liftgate
glass striker.
7. Close flipper glass and raise the liftgate.8. Continue removing the trim.
9. Disconnect the two trim panel lights.
10. Tail lamps are now visible. Rotate socket(s)
counter clockwise.
11. Remove/replace bulb(s).
12. Reinstall the socket(s)
13. Reverse process to reinstall the liftgate
trim.
Rear Liftgate Tail Lamps
324

Storing Your Vehicle............321
Sun Roof ................ 139,140
Sun Visor Extension .............69
Sunglasses Storage ............138
Supplemental Restraint
System - Airbag ...............37
Suspension, Air ..............236
Sway Control, Trailer ............248
Synthetic Engine Oil ............303
Tachometer .................159
Telescoping Steering Column ....113,114
Temperature Control, Automatic (ATC) . . 205
Temperature Gauge, Engine Coolant . . 164
Tether Anchor, Child Restraint .......51
Tie Down Hooks, Cargo ..........148
Tilt Steering Column .........113,114
Tires ................... 58,252
Air Pressure ...............253
Chains ..................254
Changing ................283
High Speed ...............253
Inflation Pressures ............253
Jacking ..................283 Pressure Monitor System (TPMS) . . . 257
Pressure Warning Light
.........160
Radial ..................253
Replacement ..............255
Rotation .................256
Spare Tire ................283
Spinning .................253
Tread Wear Indicators .........254
Tongue Weight/Trailer Weight .......270
Tow/Haul Indicator Light .........160
Towing ................. 266,291
Disabled Vehicle ............291
Guide ...................270
Recreational ...............276
Weight ..................270
Towing Eyes ................290
Traction Control ..............246
Trailer Sway Control (TSC) ........248
Trailer Towing ................266
Cooling System Tips ..........275
Hitches ..................275
Minimum Requirements .........271
Trailer and Tongue Weight .......270
Wiring ..................272 Trailer Towing Guide
............270
Trailer Weight ................270
Transfer Case ...............313
Maintenance ...............313
Transmission Automatic ........... 222,226,313
Maintenance ...............

313
Shifting ..................221
Transmitter Battery Service
(Remote Keyless Entry) ...........19
Transmitter Programming
(Remote Keyless Entry) ...........17
Transmitter, Remote Keyless Entry
(RKE) .....................17
Tread Wear Indicators ...........254
Turn Signals ........... 160,323,324
UCI Connector ...............183
Uconnect™ (Hands-Free Phone) .....74
Universal Consumer Interface (UCI)
Connector .................183
Untwisting Procedure, Seat Belt ......32
Upholstery Care ..............317
373