2020 Ram 1500 ESP

IN CASE OF EMERGENCY 447
F30––Spare
F31 ––Spare
F32 20 Amp Blue –ECM / PCM
F33 30 Amp Pink –Brake Vacuum Pump
F34 ––Spare
F35 –10 Amp Red PCM / ECM / Power Pack Unit (PPU) Motor
Generator Unit (MGU) Wake Up / EPS / Active
Tuned Mass Module (ATMM) / ESP
F36 ––Spare
F37 –5 Amp Tan R / S Output to iPDC
F38 –10 Amp Red DTCM / Active CL TEMP VLV
F39 ––Spare
F40 40 Amp Green –Starter
F41 –10 Amp Red IRCAM Heaters
F42 ––Spare
F43 –20 Amp Yellow MGU Coolant Pump – If Equipped
F44 ––Spare
F45 ––Spare
F46 30 Amp Pink –Fuel Heater – If Equipped
F47 30 Amp Pink –Rear Defroster
Cavity
Cartridge Fuse Micro Fuse Description
6
2020_DT_1500_OM_US.book Page 447

IN CASE OF EMERGENCY 449
Internal Power Distribution Center
The Power Distribution Center is located under the drivers
side instrument panel. 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.
CAUTION!
• When installing the power distribution center cover, it is important to ensure the cover is properly positioned
and fully latched. Failure to do so may allow water to
get into the power distribution center and possibly
result in an electrical system failure.
• When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use
of a fuse with a rating other than indicated may result
in a dangerous electrical system overload. If a properly
rated fuse continues to blow, it indicates a problem in
the circuit that must be corrected.
Cavity Cartridge Fuse Micro Fuse Description
F01 30 Amp Pink –Trailer Tow Receptacle
F03 –20 Amp Yellow Module Seat Heater Front (Pass)
F04 ––Spare
F05 –20 Amp Yellow Module PPU Cooling Fan
F06 40 Amp Green –Mod CBC 4 Exterior Light 2
F07 40 Amp Green –Mod CBC 3 PWR Locks
F08 ––Spare
F09 ––Spare
F10 40 Amp Green –HVAC Blower Motor
6
2020_DT_1500_OM_US.book Page 449

460 IN CASE OF EMERGENCY
4. Rotate the lug wrench handle counterclockwise until thespare tire is on the ground with enough cable slack to
allow you to pull it out from under the vehicle.
Rotating The Lug Wrench Handle 5. Pull the spare tire out from under the vehicle to gain
access to the spare tire retainer.
Pulling The Spare Tire Out
2020_DT_1500_OM_US.book Page 460

IN CASE OF EMERGENCY 467
6. Remove the lug nuts and pull the wheel off. Install thespare wheel and lug nuts with the cone shaped end of the
lug nuts toward the wheel. Hand tighten the lug nuts
with vehicle lifted. To avoid the risk of forcing the vehicle
off the jack, do not fully tighten the lug nuts until the
vehicle has been lowered.
7. Lower vehicle to ground, finish tightening the lug nuts. Push down on the wrench while at the end of the handle
for increased leverage. Tighten the lug nuts in a star
pattern until each nut has been tightened twice.
NOTE:
For the correct lug nut torque refer to “Technical Specifica -
tions” in “Torque Specifications.” If in doubt about the
correct tightness, have them checked with a torque wrench
by an authorized dealer or service station. 8. If your vehicle is equipped with a wheel center cap, install
the cap and remove the wheel blocks. Do not install
chrome or aluminum wheel center caps on the spare
wheel. This may result in cap damage.
9. Lower the jack to its fully closed position. Stow the replaced tire, and secure the jack and tools in the proper
location.
10. Adjust the tire pressure when possible.
WARNING!
Raising the vehicle higher than necessary can make the
vehicle less stable. It could slip off the jack and hurt
someone near it. Raise the vehicle only enough to
remove the tire.WARNING!
A loose tire or jack thrown forward in a collision or hard
stop, could endanger the occupants of the vehicle.
Always stow the jack parts and the spare tire in the
places provided.
6
2020_DT_1500_OM_US.book Page 467

IN CASE OF EMERGENCY 481
Emergency Tow Hooks — If Equipped
Your vehicle may be equipped with emergency tow hooks.
NOTE:
For off-road recovery, it is recommended to use both of the
front tow hooks to minimize the risk of damage to the
vehicle.
ENHANCED ACCIDENT RESPONSE SYSTEM (EARS)
This vehicle is equipped with an Enhanced Accident
Response System.
Please refer to “Occupant Restraint Systems” in “Safety” for
further information on the Enhanced Accident Response
System (EARS) function.
EVENT DATA RECORDER (EDR)
This vehicle is equipped with an Event Data Recorder (EDR).
The main purpose of an EDR is to record data that will assist
in understanding how a vehicle’s systems performed under
certain crash or near crash-like situations, such as an air bag
deployment or hitting a road obstacle.
Please refer to “Occupant Restraint Systems” in “Safety” for
further information on the Event Data Recorder (EDR).
• Towing this vehicle in violation of the above require
-
ments can cause severe transmission and/or transfer
case damage. Damage from improper towing is not
covered under the New Vehicle Limited Warranty.
WARNING!
• Do not use a chain for freeing a stuck vehicle. Chains may break, causing serious injury or death.
• Stand clear of vehicles when pulling with tow hooks. Tow straps may become disengaged, causing serious
injury. CAUTION!
(Continued)
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for tow
truck hookup or highway towing. You could damage
your vehicle.
6
2020_DT_1500_OM_US.book Page 481

SERVICING AND MAINTENANCE 509
NOTE:
• It is the owner's responsibility to maintain the proper levelof protection against freezing according to the tempera -
tures occurring in the area where the vehicle is operated.
• Some vehicles require special tools to add coolant prop -
erly. Failure to fill these systems properly could lead to
severe internal engine damage. If any coolant is needed to
be added to the system, please contact a local authorized
dealer.
• Mixing engine coolant (antifreeze) types is not recom -
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency, have
a authorized dealer drain, flush, and refill with OAT
coolant (conforming to MS.90032) as soon as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant (anti -
freeze) will return to the radiator from the coolant expansion
bottle/recovery tank if so equipped.
The cap should be inspected and cleaned if there is any accu-
mulation of foreign material on the sealing surfaces. Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a regu-
lated substance requiring proper disposal. Check with your
local authorities to determine the disposal rules for your
community. To prevent ingestion by animals or children, do
not store ethylene glycol-based coolant in open containers or
allow it to remain in puddles on the ground. If ingested by a
child or pet, seek emergency assistance immediately. Clean
up any ground spills immediately.WARNING!
• Do not open hot engine cooling system. Never add engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an over -
heated engine. Heat causes pressure to build up in the
cooling system. To prevent scalding or injury, do not
remove the pressure cap while the system is hot or
under pressure.
• Do not use a pressure cap other than the one specified for your vehicle. Personal injury or engine damage may
result.
7
2020_DT_1500_OM_US.book Page 509

518 SERVICING AND MAINTENANCE
65, 85, 80 = Aspect ratio in percent (%)
• Ratio of section height to section width of tire, or
10.5 = Section width in inches (in)
R = Construction code
• "R" means radial construction, or
• "D" means diagonal or bias construction
15, 16, 18 = Rim diameter in inches (in)
Service Description:
95 = Load Index
• A numerical code associated with the maximum load a tire can carry
H = Speed Symbol
• A symbol indicating the range of speeds at which a tire can carry a load corresponding to its load index under certain oper -
ating conditions
• The maximum speed corresponding to the speed symbol should only be achieved under specified operating conditions (i.e., tire pressure, vehicle loading, road conditions, and posted speed limits) EXAMPLE:
2020_DT_1500_OM_US.book Page 518

SERVICING AND MAINTENANCE 525
(Continued)
Tires — General Information
Tire Pressure
Proper tire inflation pressure is essential to the safe and satis-
factory operation of your vehicle. Four primary areas are
affected by improper tire pressure:
• Safety
• Fuel Economy
• Tread Wear
• Ride Comfort and Vehicle Stability
Safety
Both under-inflation and over-inflation affect the stability of
the vehicle and can produce a feeling of sluggish response or
over responsiveness in the steering.
NOTE:
• Unequal tire pressures from side to side may cause erraticand unpredictable steering response.
• Unequal tire pressure from side to side may cause the vehicle to drift left or right.
WARNING!
• Improperly inflated tires are dangerous and can cause collisions.
• Underinflation increases tire flexing and can result in overheating and tire failure.
• Overinflation reduces a tire's ability to cushion shock. Objects on the road and chuckholes can cause damage
that result in tire failure.
• Overinflated or underinflated tires can affect vehiclehandling and can fail suddenly, resulting in loss of
vehicle control.
• Unequal tire pressures can cause steering problems. You could lose control of your vehicle.
• Unequal tire pressures from one side of the vehicle to the other can cause the vehicle to drift to the right or
left.
• Always drive with each tire inflated to the recom -
mended cold tire inflation pressure.
WARNING! (Continued)
7
2020_DT_1500_OM_US.book Page 525