heater RAM CHASSIS CAB 2021 Owner's Manual

344IN CASE OF EMERGENCY
Replace the wheel covers using a rubber mallet
to ease the installation. Align the wheel cover
vent holes to the wheel vent holes. Tap on the
wheel cover as needed to firmly seat it evenly
around the wheel.
JUMP STARTING
If your vehicle has a discharged battery, it can
be jump started using a set of jumper cables
and a battery in another vehicle, or by using a
portable battery booster pack. Jump starting
can be dangerous if done improperly, so please
follow the procedures in this section carefully. NOTE:
When using a portable battery booster pack,
follow the manufacturer's operating instruc
-
tions and precautions.
PREPARATIONS FOR JUMP START
The battery in your vehicle is located in the front
of the engine compartment, behind the left
headlight assembly.

Battery Location
If you have a diesel engine, you may have two
batteries, however jump start off the driver side
battery.
The positive battery post may be covered with a
protective cap if equipped. Lift up on the cap to
gain access to the positive battery post. Do not
jump off fuses. Only jump directly off positive
post which has a positive
(+) symbol on or
around the post.

Positive (+) Battery Post

NOTE:

1. Apply the parking brake, shift the automatic transmission into PARK and
turn the ignition OFF.

2. Turn off the heater, radio, and all electrical accessories.
The rear hub caps on the dual rear wheel
has two pull off notches. Make sure that the
hook of the jack handle driver is located
squarely in the cap notch before attempting
to pull off.
WARNING!
Do not attempt jump starting if the battery is
frozen. It could rupture or explode and cause
personal injury.
CAUTION! (Continued)CAUTION!
Do not use a portable battery booster pack or
any other booster source with a system
voltage greater than 12 Volts or damage to
the battery, starter motor, alternator or
electrical system may occur.

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346IN CASE OF EMERGENCY
6. Once the engine is started, follow the
disconnecting procedure below.
Disconnecting The Jumper Cables

1. Disconnect the negative
(-)
end of the
jumper cable from the engine ground of
the vehicle with the discharged battery.

2. Disconnect the opposite end of the negative (-) jumper cable from the
negative (-) post of the booster battery.
3. Disconnect the positive (+) end of the
jumper cable from the positive (+) post of
the booster battery.
4. Disconnect the opposite end of the positive (+) jumper cable from the
positive (+) post of the vehicle with the
discharged battery.
If frequent jump starting is required to start your
vehicle you should have the battery and charging
system inspected at an authorized dealer.

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can
reduce the potential for overheating by taking
the appropriate action.
On the highways — slow down.
In city traffic — while stopped, place the trans
-
mission in NEUTRAL, but do not increase the
engine idle speed while preventing vehicle
motion with the brakes. NOTE:
There are steps that you can take to slow down
an impending overheat condition:
If your Air Conditioner (A/C) is on, turn it off.
The A/C system adds heat to the engine
cooling system and turning the A/C off can
help remove this heat.
You can also turn the temperature control to
maximum heat, the mode control to floor and
the blower control to high. This allows the
heater core to act as a supplement to the
radiator and aids in removing heat from the
engine cooling system.
CAUTION!
Do not connect jumper cable to any of the
fuses on the positive battery terminal. The
resulting electrical current will blow the fuse.
CAUTION!

Accessories plugged into the vehicle power
outlets draw power from the vehicle’s battery,
even when not in use (i.e., cellular devices,
etc.). Eventually, if plugged in long enough
without engine operation, the vehicle’s battery
will discharge sufficiently to degrade battery
life and/or prevent the engine from starting.

WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from
your radiator. If you see or hear steam coming
from under the hood, do not open the hood
until the radiator has had time to cool. Never
try to open a cooling system pressure cap
when the radiator or coolant bottle is hot.

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SERVICING AND MAINTENANCE395
Power Distribution Center
The Power Distribution Center is located in the
engine compartment near the battery. This
center contains cartridge fuses, micro fuses,
relays, and circuit breakers. A description of
each fuse and component may be stamped on
the inside cover, otherwise the cavity number of
each fuse is stamped on the inside cover that
corresponds to the following chart.

Power Distribution Center Location

Cavity Cartridge FuseMicro Fuse Description
F01– –Spare
F02 60 Amp Yellow –ABS Pump Motor (HD Only)
F03 60 Amp Yellow –Rad Fan – If Equipped
F04 50 Amp Red 400W Inverter – If Equipped
F05 40 Amp Green –Compressor For Air Suspension – If Equipped
F06 40 Amp Green –Steering Torque Overlay Module (STOM)
F07 40 Amp Green –Starter Solenoid
F08 20 Amp Blue –NOX Sensor – If Equipped
F09 40 Amp Green –Diesel / Fuel Heater – If Equipped
F09 30 Amp Pink –Gas / Brake Vacuum Pump – If Equipped
F10 40 Amp Green –CBC #2 / Ext Lights
F11 40 Amp Green –Brake System Module (ECU and Valves)
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SERVICING AND MAINTENANCE397
F32– –Spare
F33 20 Amp Blue –Trans Control Module – If Equipped
F34 30 Amp Pink –Vehicle System Interface Module #2 – If Equipped
F35 30 Amp Pink –Sunroof – If Equipped
F36 30 Amp Pink –Electric Back Light – If Equipped
F37 30 Amp Pink –Diesel Frame / Fuel Heater #2– If Equipped
F38 30 Amp Pink –Integrated Trailer Brake Module – If Equipped
F39 – –Spare
F40 –10 Amp Red Ventilated Seats – If Equipped
F41 –10 Amp Red Active Grille Shutter / Active Air Dam – If Equipped
F42 –20 Amp Yellow Horn
F43 –15 Amp Blue Heated Steering Wheel – If Equipped
F44 –10 Amp Red Diagnostic Port
F46 –10 Amp Red Upfitters Relay Coil – If Equipped
F47 – –Spare
F48 – –Spare
F49 –10 Amp Red IP Cluster / CSG
F50 –20 Amp Yellow Air Suspension Control Module – If Equipped
F51 –10 Amp RedIgnition Node Module / Keyless Ignition Node Module, Radio Frequency
Hub Module / Electric Steering Column Lock - If Equipped
F52 –5 Amp Tan Battery Sensor
Cavity Cartridge Fuse Micro Fuse Description
8

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452 Diesel Exhaust Brake
.................................... 138Diesel Fuel..................................................... 436Diesel Fuel Requirements............................. 436Diesel Fuel System, Re-Priming..................... 378Differential, Limited Slip................................ 162Dipsticks Power Steering.......................................... 163Disabled Vehicle Towing................................ 350Disc Drive...................................................... 255Disconnecting................................................ 262DisposalAntifreeze (Engine Coolant)....................... 385Disturb........................................................... 265Door Ajar........................................................ 110Door Ajar Light............................................... 110Door LocksAutomatic.................................................... 28Doors............................................................... 24Draining Fuel/Water Separator Filter............ 375Driver Memory Presets.................................. 253Driver’s Seat Back Tilt..................................... 33DrivingThrough Flowing, Rising, Or Shallow Standing Water
.................................................... 218Dual Rear Wheels....................... 342, 425, 432
E
Electric Brake Control System....................... 274Anti-Lock Brake System............................. 273Electronic Roll Mitigation................. 275, 281
Electrical Power Outlets................................... 73Electronic Range Select (ERS)............. 145, 150Electronic Stability Control (ESC).................. 275Electronic Throttle Control Warning Light...... 109Electronically Shifted Transfer Case.... 153, 156Emergency Braking....................................... 137Emergency, In Case OfFreeing Vehicle When Stuck..................... 349Hazard Warning Flasher........................... 334Jacking..................................................... 339Jump Starting........................................... 344Emission Control System Maintenance........ 117Engine.................................................. 364, 365Air Cleaner................................................ 369Block Heater............................................. 125Break-In Recommendations............ 136, 137Compartment........................................... 365Compartment Identification...................... 364Coolant (Antifreeze).................................. 440Exhaust Gas Caution................................ 333Fails To Start............................................ 121Flooded, Starting...................................... 121Fuel Requirements................................... 433Identification............................................ 365Idling........................................................ 131Jump Starting........................................... 344Oil.................................................... 368, 440Oil Filler Cap............................................. 364Oil Filter.................................................... 369
Oil Reset......................................................91Oil Selection.............................................. 368Oil Synthetic.............................................. 368Overheating.............................................. 346Runaway................................................... 195Starting..................................................... 119Enhanced Accident Response
Feature................................................ 310, 352Entry System, Illuminated................................56Ethanol.......................................................... 434Exhaust Brake............................................... 138Exhaust Gas Cautions................................... 333Exhaust System..........................333, 382, 391Exterior Lighting...............................................50Exterior Lights........................................ 50, 332
F
FiltersAir Cleaner
................................................ 369Air Conditioning................................. 65, 372Engine Fuel...................................... 375, 440Engine Oil........................................ 369, 440Engine Oil Disposal................................... 369FlashersTurn Signals.............................. 54, 115, 332Flash-To-Pass...................................................52Flat Tire Stowage.......................................... 343Fluid Capacities............................................ 439Fluid Leaks.................................................... 332

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457
Service Manuals
............................................ 448Settings, Audio.............................................. 253Shift Lever Override....................................... 347Shifting.......................................................... 140Automatic Transmission.................. 141, 146Transfer Case............................................ 161Transfer Case, Shifting Into Transfer Case Neutral (N)................................... 216Transfer Case, Shifting Out Of Transfer Case Neutral (N)................................... 217Signals, Turn..................................54, 115, 332Sirius Satellite Radio..................................... 249Favorites................................................... 252Replay....................................................... 251SiriusXM Satellite RadioBrowse in SXM.......................................... 252Favorites................................................... 252Replay....................................................... 251Sliding Rear Window, Power............................ 78Snow Chains (Tire Chains)............................. 422Snow Plow..................................................... 212Snow Tires..................................................... 419Spare Tires................................. 419, 420, 421Spark Plugs................................................... 440Speed ControlAccel/Decel............................................... 165Cancel....................................................... 165Resume..................................................... 165
Speed Control (Cruise Control)............ 164, 166Starting....................................... 118, 119, 122Automatic Transmission.................. 118, 123Button......................................................... 18Cold Weather............................................ 122Engine Block Heater................................. 125Engine Fails To Start................................. 121Starting And Operating.................................. 119Starting Procedures............................. 119, 122Starting Procedures (Diesel Engines)........... 122Starting Procedures (Gas Engines)............... 118SteeringPower....................................................... 163Tilt Column.................................................. 29Wheel, Heated............................................. 29Wheel, Tilt.................................................... 29Steering Wheel Audio Controls..................... 247Steering Wheel Mounted Sound System...... 247Storage............................................................ 66Storage Compartment, Center Seat................. 67Storage, Vehicle......................................65, 427Store Radio Presets...................................... 253Storing Your Vehicle...................................... 427Sunglasses Storage......................................... 69Sway Control, Trailer..................................... 281Synthetic Engine Oil...................................... 368
T
Telescoping Steering Column...........................29Temperature Control, Automatic (ATC).............64TiltDown...........................................................35Up................................................................35Tilt Steering Column.........................................29Tip Start............................................... 118, 123Tire And Loading Information Placard........... 411Tire Markings................................................ 406Tire Safety Information.................................. 406Tires.................................. 332, 414, 419, 425Aging (Life Of Tires)................................... 417Air Pressure.............................................. 414Chains...................................................... 422Changing.................................................. 339Compact Spare......................................... 419Dual........................................342, 425, 432General Information........................ 414, 419High Speed............................................... 415Inflation Pressure..................................... 415Jacking...................................................... 339Life Of Tires.............................................. 417Load Capacity........................................... 411Pressure Monitoring System (TPMS)......................................... 111, 284Quality Grading......................................... 425Radial....................................................... 416Replacement............................................ 417
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