battery RAM CHASSIS CAB 2021 Workshop Manual

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)
8

21_DPF_OM_EN_USC_t.book Page 395

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

21_DPF_OM_EN_USC_t.book Page 397

402SERVICING AND MAINTENANCE
Replacing Exterior Bulbs
Base Quad: Low Beam Headlamp, High Beam
Headlamp, Front Park And Turn — If Equipped
Low Beam
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery
cable. 3. Reach into the front wheel house ahead of
the front wheel, remove the fastener, and
lift the cover over the access hole in the
front of the wheel house splash shield.
Access to the rear of the lamp can be gained
through this access hole.

Splash Shield Access Cover

Front Position (LED Headlamps)
LED (Serviced at an authorized dealer)
Turn Signal (LED Reflector Headlamp) 7444NA
Front Side Marker (Headlamps) LED (Serviced at an authorized dealer)
Front Fog Lamps (Halogen Reflector Headlamp) H11LL
Front Fog Lamps (LED Headlamp) LED (Serviced at an authorized dealer)
Side Indicators (Front And Side View Mirror) LED (Serviced at an authorized dealer)
Center High Mounted Stop Lamp (CHMSL) 921
Cab Roof Marker Lamps 194NA
Box Off Tail Lamps – Stop/Turn/Tail/License Plate 1157
Box Off Tail Lamps – Back Up 1156
Exterior Bulbs
Bulb Name Bulb Number

21_DPF_OM_EN_USC_t.book Page 402

SERVICING AND MAINTENANCE403
4. Reach through the access hole of the wheel
house splash shield and disengage the bulb
access cover by rotating counterclockwise.

Bulb Access Cover

5. Disconnect the internal lamp wiring harness connector from the low beam bulb. 6. Rotate the bulb counterclockwise a quarter
turn to unlock the bulb from the lamp.
7. Pull the bulb straight out from the housing.
8. Reverse the procedure for installation of new bulb and covers.
High Beam
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery cable.

Bulb Access Cover

3. Look under the hood and behind the headlamp to find the high beam bulb
access cover. 4. Reach behind the headlamp and disengage
the access cover by rotating counter -
clockwise.
5. Disconnect the internal lamp wiring harness connector from the high beam bulb.
6. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the lamp.
7. Pull the bulb straight out from the housing.
8. Reverse the procedure for installation of new bulb and covers.
CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened
bulb life will result.

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 bulb socket, or the lamp wiring.

CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened
bulb life will result.
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 bulb socket, or the lamp
wiring.
8

21_DPF_OM_EN_USC_t.book Page 403

404SERVICING AND MAINTENANCE
Outer Park And Turn
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery
cable.
3. Reach into the front wheel house ahead of the front wheel, remove the fastener, and
lift the cover over the access hole in the
front of the wheel house splash shield.
Access to the rear of the lamp can be gained
through this access hole.

Splash Shield Access Cover
4. Reach through the access hole of the wheel
house splash shield and disengage the side
marker socket by rotating counterclockwise
a quarter turn.

Park And Turn Socket

5. Pull the socket and bulb straight out from the housing.
6. Separate the bulb from the socket without twisting.
7. Reverse the procedure for installation of new bulb and covers. Fog Lamps — If Equipped
Halogen
See below steps to replace:

1. Reach under and behind the front fascia/
bumper to access the back of the front fog
lamp housing.

2. Disconnect the fog lamp wiring harness connector from the fog lamp bulb.

Fog Lamp Bulb

3. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the housing.
4. Pull the bulb straight out from the housing.
5. Reverse the procedure to install the bulb and cover.

21_DPF_OM_EN_USC_t.book Page 404

SERVICING AND MAINTENANCE427
STORING THE VEHICLE
If you are storing your vehicle for more than
three weeks, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
Disconnect the negative cable from battery.

Any time you store your vehicle or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for
about five minutes in the fresh air and high
blower setting. This will ensure adequate
system lubrication to minimize the possibility
of compressor damage when the system is
started again.

BODYWORK
PROTECTION FROM ATMOSPHERIC
A
GENTS
Vehicle body care requirements vary according
to geographic locations and usage. Chemicals
that make roads passable in snow and ice and
those that are sprayed on trees and road
surfaces during other seasons are highly corrosive to the metal in your vehicle. Outside
parking, which exposes your vehicle to airborne
contaminants, road surfaces on which the
vehicle is operated, extreme hot or cold weather
and other extreme conditions will have an
adverse effect on paint, metal trim, and
underbody protection.
The following maintenance recommendations
will enable you to obtain maximum benefit from
the corrosion resistance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or
removal of paint and protective coatings from
your vehicle.
The most common causes are:
Road salt, dirt and moisture accumulation.
Stone and gravel impact.
Insects, tree sap and tar.
Salt in the air near seacoast localities.
Atmospheric fallout/industrial pollutants.
BODY AND UNDERBODY MAINTENANCE
Cleaning Headlights
Your vehicle is equipped with plastic headlights
and fog lights that are lighter and less
susceptible to stone breakage than glass
headlights.
Plastic is not as scratch resistant as glass and
therefore different lens cleaning procedures
must be followed.
To minimize the possibility of scratching the
lenses and reducing light output, avoid wiping
with a dry cloth. To remove road dirt, wash with
a mild soap solution followed by rinsing.
Do not use abrasive cleaning components,
solvents, steel wool or other aggressive
material to clean the lenses.
8

21_DPF_OM_EN_USC_t.book Page 427

450
INDEX
 Pair (Link) Uconnect Phone To A Mobile
Phone............................................................ 260 WARRANTY INFORMATION...................... 447
A
Adaptive Cruise Control (ACC)
(Cruise Control)
.................................... 164, 166Adding Engine Coolant (Antifreeze)............... 384Adding Fuel.................................................... 196Additives, Fuel............................................... 434Adjust Down........................................................... 35Forward....................................................... 35Rearward..................................................... 35Up................................................................ 35Adjustable Pedals............................................ 40Advance Phone Connectivity......................... 266Air BagAir Bag Operation...................................... 305Air Bag Warning Light................................ 303Enhanced Accident Response......... 310, 352Event Data Recorder (EDR)....................... 352If Deployment Occurs................................ 309Knee Impact Bolsters................................ 305Maintaining Your Air Bag System.............. 311Maintenance............................................. 311
Redundant Air Bag Warning Light............. 303Transporting Pets..................................... 330Air Bag Light................................ 107, 303, 331Air Cleaner, Engine (Engine Air Cleaner
Filter)................................................... 369, 391Air Conditioner Maintenance........................ 371Air Conditioner Refrigerant.................. 371, 372Air Conditioner System................................. 371Air Conditioning................................................ 62Air Conditioning Filter....................................... 65Air Conditioning System................................... 64Air Conditioning, Operating Tips....................... 65Air Filter........................................................ 369Air PressureTires......................................................... 415AlarmSecurity Alarm....................................23, 108Alterations/ModificationsVehicle......................................................... 10Antifreeze (Engine Coolant).......................... 384Capacities................................................. 439Disposal................................................... 385Anti-Lock Brake System (ABS)...................... 273Anti-Lock Warning Light................................ 113Assist, Hill Start............................................. 280Audio Settings............................................... 253Audio Systems (Radio).................................. 220
Auto Down Power Windows..............................77Automatic Door Locks......................................28Automatic Headlights.......................................52Automatic Temperature Control (ATC)..............64Automatic Transmission....................... 141, 389Adding Fluid.............................................. 389Fluid And Filter Change............................. 389Fluid Change............................................. 389Fluid Level Check............................. 387, 388Fluid Type........................................ 390, 444Shifting..................................................... 146Special Additives...................................... 387Automatic Transmission Limp Home Mode... 145AutoPark....................................................... 120AUX Camera......................................... 188, 194Auxiliary Driving Systems.............................. 281Axle Fluid.....................................390, 391, 444Axle Lubrication................................... 390, 391
B
Back-Up......................................................... 186Back-Up Camera........................................... 186Battery................................................. 108, 366Blanket..................................................... 130Charging System Light.............................. 108Keyless Key Fob Replacement....................16Battery Saver Feature......................................54

21_DPF_OM_EN_USC_t.book Page 450

454 J
Jack Location
................................................. 339Jack Operation............................................... 339Jacking And Tire Changing............................. 339Jump Starting................................................ 344
K
Key Fob Programming Additional Key Fobs
.............. 17Key Fob Battery Service (Remote
Keyless Entry).................................................. 16Key Fob Programming (Remote
Keyless Entry).................................................. 17Keyless Enter-N-Go........................26, 118, 123Passive Entry............................................... 26Keys................................................................. 15
L
Lane Change And Turn Signals........................ 54Lane Change Assist......................................... 54LaneSense.................................................... 183Latches.......................................................... 332Hood........................................................... 79Lead Free Gasoline........................................ 433Leaks, Fluid................................................... 332Life Of Tires................................................... 417Light Bulbs........................................... 332, 401
Lights............................................................ 332Air Bag.................................... 107, 303, 331Automatic High Beam.................................. 52Brake Assist Warning............................... 277Brake Warning.......................................... 107Bulb Replacement.................................... 401Cab Top Clearance................................... 405Cargo........................................................... 54Center Mounted Stop............................... 405Courtesy/Reading....................................... 55Cruise....................................................... 115Daytime Running......................................... 51Electronic Stability Program(ESP) Indicator............................................... 108Exterior...............................................50, 332Fog........................................................... 404Four Wheel Drive Indicator....................... 162Hazard Warning Flasher........................... 334Headlights............................................ 50, 52High Beam................................................... 51Hill Descent Control Indicator................... 278Illuminated Entry......................................... 56Interior......................................................... 55Lights On Reminder..................................... 53Low Fuel................................................... 111Malfunction Indicator (Check Engine)....... 110Park.......................................................... 115Passing........................................................ 52
Seat Belt Reminder.................................. 107Security Alarm.......................................... 108Service...................................................... 401Traction Control........................................ 277Transfer Case........................................... 162Turn Signals..................... 54, 115, 332, 402Warning Instrument Cluster Descriptions................................ 108, 115Limited-Slip Differential....................... 162, 391Load Shed Battery Saver Mode..................... 105Load Shed Battery Saver On......................... 105Load Shed Electrical Load Reduction........... 105Load Shed Intelligent Battery Sensor............ 105Loading Vehicle............................................. 199Tires.......................................................... 411LocksAutomatic Door............................................28Child Protection...........................................28Power Door..................................................25Low Tire Pressure System............................. 284Lubrication, Body.......................................... 380Lug Nuts/Bolts..................................... 342, 432
M
Maintenance Free Battery............................ 366Maintenance Plan......................................... 359Maintenance Schedule............... 353, 357, 359Malfunction Indicator Light (Check Engine).. 110

21_DPF_OM_EN_USC_t.book Page 454