brake light RAM 1500 2021 Workshop Manual

370SAFETY
(Continued)
(Continued)
Floor Mat Safety Information
Always use floor mats designed to fit your
vehicle. Only use a floor mat that does not
interfere with the operation of the accelerator,
brake or clutch pedals. Only use a floor mat that
is securely attached using the floor mat
fasteners so it cannot slip out of position and
interfere with the accelerator, brake or clutch
pedals or impair safe operation of your vehicle
in other ways.
WARNING!
An improperly attached, damaged, folded, or
stacked floor mat, or damaged floor mat
fasteners may cause your floor mat to
interfere with the accelerator, brake, or clutch
pedals and cause a loss of vehicle control. To
prevent SERIOUS INJURY or DEATH:
ALWAYS securely attach your floor mat
using the floor mat fasteners. DO NOT
install your floor mat upside down or turn
your floor mat over. Lightly pull to confirm
mat is secured using the floor mat
fasteners on a regular basis.
ALWAYS REMOVE THE EXISTING FLOOR
MAT FROM THE VEHICLE before
installing any other floor mat. NEVER install
or stack an additional floor mat on top of an
existing floor mat.
ONLY install floor mats designed to fit your
vehicle. NEVER install a floor mat that
cannot be properly attached and secured to
your vehicle. If a floor mat needs to be
replaced, only use a FCA approved floor
mat for the specific make, model, and year
of your vehicle.
ONLY use the driver’s side floor mat on the
driver’s side floor area. To check for inter
-
ference, with the vehicle properly parked
with the engine off, fully depress the accel -
erator, the brake, and the clutch pedal (if
present) to check for interference. If your
floor mat interferes with the operation of
any pedal, or is not secure to the floor,
remove the floor mat from the vehicle and
place the floor mat in your trunk.
ONLY use the passenger’s side floor mat on
the passenger’s side floor area.
WARNING! (Continued)
ALWAYS make sure objects cannot fall or
slide into the driver’s side floor area when
the vehicle is moving. Objects can become
trapped under accelerator, brake, or clutch
pedals and could cause a loss of vehicle
control.
NEVER place any objects under the floor
mat (e.g., towels, keys, etc.). These objects
could change the position of the floor mat
and may cause interference with the accel -
erator, brake, or clutch pedals.
If the vehicle carpet has been removed and
re-installed, always properly attach carpet
to the floor and check the floor mat
fasteners are secure to the vehicle carpet.
Fully depress each pedal to check for inter -
ference with the accelerator, brake, or
clutch pedals then re-install the floor mats.
It is recommended to only use mild soap
and water to clean your floor mats. After
cleaning, always check your floor mat has
been properly installed and is secured to
your vehicle using the floor mat fasteners
by lightly pulling mat.
WARNING! (Continued)

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SAFETY371
PERIODIC SAFETY CHECKS YOU SHOULD
M
AKE OUTSIDE THE VEHICLE
Tires
Examine tires for excessive tread wear and
uneven wear patterns. Check for stones, nails,
glass, or other objects lodged in the tread or
sidewall. Inspect the tread for cuts and cracks.
Inspect sidewalls for cuts, cracks, and bulges.
Check the lug nut/bolt torque for tightness.
Check the tires (including spare) for proper cold
inflation pressure.
Lights
Have someone observe the operation of brake
lights and exterior lights while you work the
controls. Check turn signal and high beam
indicator lights on the instrument panel.
Door Latches
Check for proper closing, latching, and locking.
Fluid Leaks
Check area under the vehicle after overnight
parking for fuel, coolant, oil, or other fluid leaks.
Also, if gasoline fumes are detected or if fuel or
brake fluid leaks are suspected, the cause
should be located and corrected immediately.
EXHAUST GAS The best protection against carbon monoxide
entry into the vehicle body is a properly
maintained engine exhaust system.
Whenever a change is noticed in the sound of
the exhaust system, when exhaust fumes can
be detected inside the vehicle, or when the
underside or rear of the vehicle is damaged,
have an authorized dealer inspect the complete
exhaust system and adjacent body areas for
broken, damaged, deteriorated, or
mispositioned parts. Open seams or loose
connections could permit exhaust fumes to
seep into the passenger compartment. In
addition, inspect the exhaust system each time
the vehicle is raised for lubrication or oil
change. Replace as required.
WARNING!
Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you
unconscious and can eventually poison you.
To avoid breathing (CO), follow these safety
tips:
Do not run the engine in a closed garage or
in confined areas any longer than needed
to move your vehicle in or out of the area.
If you are required to drive with the trunk/
liftgate/rear doors open, make sure that all
windows are closed and the climate control
BLOWER switch is set at high speed. DO
NOT use the recirculation mode.
If it is necessary to sit in a parked vehicle
with the engine running, adjust your
heating or cooling controls to force outside
air into the vehicle. Set the blower at high
speed.
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395
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GASOLINE
ENGINE
Your vehicle is equipped with an automatic oil
change indicator system. The oil change
indicator system will remind you that it is time to
take your vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent
short-trips, trailer tow, and extremely hot or cold
ambient temperatures will influence when the
“Oil Change Required” message is displayed.
Severe operating conditions can cause the
change oil message to illuminate as early as
3,500 miles (5,600 km) since last reset. Have
your vehicle serviced as soon as possible,
within the next 500 miles (805 km).
An authorized dealer will reset the oil change
indicator message after completing the
scheduled oil change. If a scheduled oil change
is performed by someone other than an authorized dealer, the message can be reset by
referring to the steps described under
Instrument Cluster Display Ú
page 114.
NOTE:
Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km),
12 months or 350 hours of engine run time,
whichever comes first. The 350 hours of engine
run or idle time is generally only a concern for
fleet customers.
Severe Duty All Models
NOTE:
Vehicles that are operated in a dusty and
off-road environment, or predominately at idle
or very low engine RPM are known as Severe
Duty vehicles. It is recommended that you
change the engine oil at 4,000 miles
(6,500 km) or 350 hours of engine run time.
Once A Month Or Before A Long Trip:
Check engine oil level.
Check windshield washer fluid level.
Check tire pressure and look for unusual
wear or damage. Rotate tires at the first sign
of irregular wear, even if it occurs before the
oil indicator system turns on.
Check the fluid levels of the coolant reservoir,
brake master cylinder, and fill as needed.
Check function of all interior and exterior
lights.
MAINTENANCE PLAN
Refer to the Maintenance Plan for required
maintenance. More frequent maintenance may
be needed in severe conditions, such as dusty
areas and very short trip driving. In some
extreme conditions, additional maintenance
not specified in the maintenance schedule may
be required.
8

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SERVICING AND MAINTENANCE399
SCHEDULED SERVICING — DIESEL ENGINE
Your vehicle is equipped with an automatic oil
change indicator system. The oil change
indicator system will remind you that it is time to
take your vehicle in for scheduled maintenance. Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent
short-trips, trailer tow, extremely hot or cold
ambient temperatures will influence when the
“Oil Change Required” message is displayed.
Severe Operating Conditions will cause the
change oil message to illuminate more
frequently. Have your vehicle serviced as soon
as possible, within the next 500 miles
(805 km).
An authorized dealer will reset the oil change
indicator message after completing the
scheduled oil change. If a scheduled oil change
is performed by someone other than an
authorized dealer, the message can be reset by
referring to the steps described under
Instrument Cluster Display Ú
page 114.NOTE:
Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km) or
12 months, whichever comes first.
Once A Month Or Before A Long Trip:
Check engine oil level
Check windshield washer fluid level
Check the tire inflation pressures and look
for unusual wear or damage
Check the fluid levels of the coolant reservoir,
brake master cylinder, and power steering,
and fill as needed
Check function of all interior and exterior
lights
WARNING!
You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge and
the right equipment. If you have any doubt
about your ability to perform a service job,
take your vehicle to a competent mechanic.
Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an acci
-
dent.
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SERVICING AND MAINTENANCE425
(Continued)
and through another hose to the intake
manifold of the engine. This cooling process
enables more efficient burning of fuel resulting
in fewer emissions.
To guarantee optimum performance of the
system, keep the surfaces of the charge air
cooler, condenser and radiator clean and free
of debris. Periodically check the hoses leading
to and from the charge air cooler for cracks or
loose clamps resulting in loss of pressure and
reduced engine performance.
BRAKE SYSTEM
In order to ensure brake system performance,
all brake system components should be
inspected periodically Ú page 395.
Fluid Level Check — Brake Master Cylinder
The fluid level of the brake master cylinder
should be checked whenever the vehicle is
serviced, or immediately if the brake system
warning light is on. If necessary, add fluid to
bring level within the designated marks on the
side of the reservoir of the brake master
cylinder. Be sure to clean the top of the master
cylinder area before removing cap. With disc
brakes, fluid level can be expected to fall as the
brake pads wear. Brake fluid level should be
checked when pads are replaced. If the brake
fluid is abnormally low, check the system for
leaks Úpage 478.
WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your foot
resting or riding on the brake pedal can result
in abnormally high brake temperatures,
excessive lining wear, and possible brake
damage. You would not have your full braking
capacity in an emergency.
WARNING!
Use only manufacturer's recommended
brake fluid Ú page 478. Using the wrong
type of brake fluid can severely damage
your brake system and/or impair its perfor -
mance. The proper type of brake fluid for
your vehicle is also identified on the original
factory installed hydraulic master cylinder
reservoir.
To avoid contamination from foreign matter
or moisture, use only new brake fluid or
fluid that has been in a tightly closed
container. Keep the master cylinder reser -
voir cap secured at all times. Brake fluid in
a open container absorbs moisture from
the air resulting in a lower boiling point. This
may cause it to boil unexpectedly during
hard or prolonged braking, resulting in
sudden brake failure. This could result in a
collision.
Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine
parts, causing the brake fluid to catch fire.
Brake fluid can also damage painted and
vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
Do not allow petroleum based fluid to
contaminate the brake fluid. Brake seal
components could be damaged, causing
partial or complete brake failure. This could
result in a collision.
WARNING! (Continued)
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434SERVICING AND MAINTENANCE
F29–20 Amp Yellow Mod CRSM (Heat Rear LT)
F30 30 Amp Pink –Mod DTCM / Mod Tailgate
F31 30 Amp Pink –Mod CBC 1 Interior Light
F32 –20 Amp Yellow RT Spot Lamp — If Equipped
F33 –10 Amp RedAssy Overhead Console / Switch 911 / Switch Assist / Heads Up
Display (HUD)
F34 –15 Amp Blue Frt & RR Ventilated Seat Motor
F35 –10 Amp RedMod Inverter / Mtr Sunshade Sunroof / Mtr Dual Sunroof / USB
Charge Only
F36 40 Amp Green –Mod CBC 2 Exterior Light 1
F37 ––Spare
F38 ––Spare
F39 ––Spare
F40 20 Amp Blue –Dome Pursuit Vehicle — If Equipped
F41 A&B –15 Amp BlueLumbar Support & Pass SW / Mod ICS Sw Bank / HVAC Ctrl / Sw
Bank Upper / Mod Ctrl Steering
F42 A&B –10 Amp RedMod Transfer Case Switch Module (TCSM) / SBW / Electric Park
Brake SW / Overhead Console (OHC) SW / E-Call / Bank 3 SW / Seat
LT & RT Vent / Mod Trailer A&B Tire Pressure / Mod Gateway Trailer
F43 A&B –10 Amp Red Port Diagnostics / Mod CD / Front & Rear USB
F44 –20 Amp Yellow Radio / DCSD / Telematics Box Mod / Fleet Telematics Module
(FTM)
Cavity
Cartridge Fuse Micro Fuse Description

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467
TECHNICAL SPECIFICATIONS
VEHICLE IDENTIFICATION NUMBER
The Vehicle Identification Number (VIN) is found
on the left front corner of the instrument panel,
visible through the windshield.
Vehicle Identification Number

NOTE:
It is illegal to remove or alter the VIN.
BRAKE SYSTEM
If power assist is lost for any reason (for
example, repeated brake applications with the
engine off), the brakes will still function.
However, you will experience a substantial
increase in braking effort to stop the vehicle.
If either the front or rear hydraulic system loses
normal braking capability, the remaining
system will still function with some loss of
overall braking effectiveness. This will be
evident by increased pedal travel during
application, greater pedal force required to slow
or stop, and the “Brake Warning Light” and the
“ABS Warning Light” will activate during brake
use.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to
ensure that the wheel is properly mounted to
the vehicle. Any time a wheel has been removed
and reinstalled on the vehicle, the lug nuts/
bolts should be torqued using a properly
calibrated torque wrench using a six sided (hex)
deep wall socket.
TORQUE SPECIFICATIONS
**Use only authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening.
Lug Nut/ Bolt
Torque Lug Nut/
Bolt Type **Lug
Nut/Bolt Size Lug Nut/
Bolt
Socket Size
130
Ft-Lbs
(176 N·m) Cone
M14 x
1.50 22 mm
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483
INDEX
A
Adaptive Cruise Control (ACC) (Cruise
Control)
................................................ 177, 179Adding Engine Coolant (Antifreeze)............... 422Adding Fuel.......................................... 208, 210Additives, Fuel............................................... 469AdjustDown........................................................... 36Forward....................................................... 36Rearward..................................................... 36Up................................................................ 36Adjustable Pedals............................................ 43Advance Phone Connectivity......................... 279Air BagAir Bag Operation...................................... 344Air Bag Warning Light...................... 342, 345Enhanced Accident Response......... 353, 394Event Data Recorder (EDR)....................... 394Front Air Bag............................................. 345If Deployment Occurs................................ 352Knee Impact Bolsters................................ 349Maintaining Your Air Bag System.............. 354Maintenance............................................. 354Redundant Air Bag Warning Light.............343Transporting Pets...................................... 369Air Bag Light............................... 126, 342, 369
Air Cleaner, Engine (Engine Air Cleaner
Filter)............................................................ 411Air Conditioner Maintenance........................ 415Air Conditioner Refrigerant........................... 415Air Conditioner System................................. 415Air Conditioning................................................ 63Air Conditioning Filter..............................67, 415Air Conditioning System................................... 65Air Conditioning, Operating Tips....................... 66Air Filter........................................................ 411Air PressureTires......................................................... 450Air Suspension..................................... 165, 169AlarmSecurity Alarm....................................26, 127Alterations/ModificationsVehicle......................................................... 11Antifreeze (Engine Coolant)................. 422, 474Disposal................................................... 423Anti-Lock Brake System (ABS)...................... 310Anti-Lock Warning Light................................ 132Assist, Hill Start............................................. 317Audio Settings............................................... 266Audio Systems (Radio).................................. 236Auto Down Power Windows............................. 78Automatic Door Locks...................................... 30
Automatic Headlights.......................................54Automatic High Beams.....................................53Automatic Tailgate Release.............................85Automatic Temperature Control (ATC)..............65Automatic Transmission....................... 156, 426Adding Fluid.............................................. 426Fluid And Filter Change............................. 426Fluid Change............................................. 426Fluid Level Check...................................... 426Fluid Type........................................ 426, 478Special Additives...................................... 426Automatic Transmission Limp Home Mode... 159AutoPark....................................................... 141AUX Camera......................................... 204, 208Auxiliary Driving Systems.............................. 318Axle Fluid.............................................. 426, 478Axle Lubrication............................................ 426
B
Back-Up......................................................... 202Back-Up Camera........................................... 202Battery................................................. 128, 409Charging System Light.............................. 128Keyless Key Fob Replacement....................18Battery Saver Feature......................................57Belts, Seat.................................................... 369
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484
Blind Spot Monitoring
.................................... 318Bluetooth Connecting To A Particular Mobile PhoneOr Audio Device After Pairing
................275Body Builders Guide........................................ 11Body Mechanism Lubrication........................ 418B-Pillar Location............................................. 447Brake Assist System...................................... 311Brake Control System.................................... 311Brake Fluid.......................................... 425, 478Brake System...................................... 425, 467Fluid Check............................................... 425Master Cylinder......................................... 425Parking...................................................... 151Warning Light............................................ 126Brake/Transmission Interlock....................... 155Bulb Replacement......................................... 437Bulbs, Light.......................................... 371, 437
C
Camera.......................................................... 202Camera, AUX........................................ 204, 208Camera, Rear...................................... 202, 204Camper............................................................ 97Capacities, Fuel............................................. 474Caps, FillerOil (Engine)................................................ 404Radiator (Coolant Pressure)...................... 423Car Washes................................................... 462
Carbon Monoxide Warning................... 371, 372Cargo Light....................................................... 56CD................................................................. 268Cellular Phone.............................................. 309Center High Mounted Stop Light................... 442Center Seat Storage Compartment.................. 68Charge Air Cooler.......................................... 424Chart, Tire Sizing........................................... 444Check Engine Light (Malfunction Indicator
Light)............................................................. 138Checking Your Vehicle For Safety................. 369Checks, Safety.............................................. 369Child Restraint.............................................. 355Child RestraintsBooster Seats........................................... 358Child Seat Installation..................... 364, 365How To Stow An unused ALR Seat Belt.... 363Infant And Child Restraints....................... 357Locating The LATCH Anchorages.............. 362Lower Anchors And Tethers For Children.. 360Older Children And Child Restraints......... 357Seating Positions...................................... 359Clean Air Gasoline......................................... 469CleaningWheels..................................................... 456Climate Control................................................ 60Automatic.................................................... 60Manual........................................................ 63Cold Weather Operation............................... 146
Compact Spare Tire...................................... 455Connected Services...................................... 282Connected Services FAQ............................... 301Connected Services Features....................... 286Connected Services, Getting Started............ 284Connected Services, Introduction................. 282Contract, Service........................................... 480Controls........................................................ 259Cooling Pressure Cap (Radiator Cap)............ 423Cooling System............................................. 421Adding Coolant (Antifreeze)...................... 422Coolant Level................................... 421, 423Cooling Capacity....................................... 474Disposal Of Used Coolant......................... 423Drain, Flush, And Refill............................. 422Inspection................................................. 423Points To Remember................................ 424Pressure Cap............................................ 423Radiator Cap............................................. 423Selection Of Coolant (Antifreeze)......................... 422, 474, 475Corrosion Protection..................................... 461Cruise ControlAccel/Decel.............................................. 178Cancel....................................................... 179Resume.................................................... 179Cruise Control (Speed Control)............. 177, 179Cruise Light................................................... 136Customer Assistance.................................... 479Cybersecurity................................................ 236

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485
D
Daytime Running Lights
................................... 53Dealer Service............................................... 409Defroster, Rear Window................................... 63Defroster, Windshield............................. 63, 369Deleting A Phone........................................... 275Diagnostic System, Onboard......................... 137Diesel Fuel..................................................... 471Diesel Fuel Requirements............................. 471Bulk Storage Of......................................... 210Diesel Fuel System, Re-Priming..................... 414Differential, Limited Slip................................ 174Disable Vehicle Towing.................................. 392Disc Drive...................................................... 268Disconnecting................................................ 275Disposal Antifreeze (Engine Coolant)....................... 423Disturb........................................................... 278Door Ajar........................................................ 129Door Ajar Light............................................... 129Door LocksAutomatic.................................................... 30Doors............................................................... 27Draining Fuel/Water Separator Filter............ 412Driver Memory Presets.................................. 265Driver’s Seat Back Tilt..................................... 34DrivingThrough Flowing, Rising, Or Shallow Standing Water
..................................... 234Dual Rear Wheels.......................................... 467
E
Electric Brake Control System....................... 311Anti-Lock Brake System............................ 310Electronic Roll Mitigation................. 312, 318Electric Parking Brake................................... 151Electrical Power Outlets................................... 74Electronic Range Select (ERS)...................... 159Electronic Stability Control (ESC).................. 312Electronic Throttle Control Warning Light...... 128Electronically Shifted Transfer Case.... 161, 163Emergency Braking....................................... 327Emergency Gas Can Refueling...................... 389Emergency, In Case OfFreeing Vehicle When Stuck..................... 391Hazard Warning Flasher........................... 373Jump Starting........................................... 386Emission Control System Maintenance........ 138Engine........................................................... 404Air Cleaner................................................ 411Block Heater............................................. 150Break-In Recommendations..................... 150Compartment................404, 405, 406, 407Compartment Identification.............404, 405, 406, 407Coolant (Antifreeze).................................. 475Exhaust Gas Caution....................... 371, 372Fails To Start............................................ 144Flooded, Starting...................................... 144Fuel Requirements.......................... 468, 474Idling........................................................ 148
Jump Starting........................................... 386Oil...........................................410, 474, 475Oil Filler Cap............................................. 404Oil Filter.................................................... 410Oil Selection..................................... 410, 474Oil Synthetic.............................................. 410Overheating.............................................. 389Starting............................................ 143, 144Enhanced Accident Response
Feature................................................ 353, 394Entry System, Illuminated................................58Ethanol.......................................................... 469Exhaust Gas Cautions.......................... 371, 372Exhaust System................................... 371, 420Exterior Lighting...............................................52Exterior Lights........................................ 52, 371
F
Family Alerts................................................. 300FiltersAir Cleaner................................................ 411Air Conditioning................................. 67, 415Engine Fuel............................................... 412Engine Oil........................................ 410, 475Engine Oil Disposal................................... 410FlashersTurn Signals.............................. 55, 136, 371Flash-To-Pass...................................................54Flat Tire Stowage.......................................... 384Fluid Capacities............................................ 474
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