2020 Ram 3500 service

STARTING AND OPERATING323
(Continued)
2. Insert DEF fill adapter/nozzle into DEF tank filler neck.
NOTE:
The DEF gauge may take up to five
seconds to update after adding a gallon
or more of Diesel Exhaust Fluid (DEF) to
the DEF tank. If you have a fault related
to the DEF system, the gauge may not
update to the new level. See an autho -
rized dealer for service.
The DEF gauge may also not immediately
update after a refill if the temperature of
the DEF fluid is below 12°F (-11°C). The
DEF line heater will possibly warm up the
DEF fluid and allow the gauge to update
after a period of run time. Under very cold
conditions, it is possible that the gauge
may not reflect the new fill level for
several drives.
Excessive overfilling of the DEF tank can
result in a MIL lamp/fault code and inac-
curate level readings. 3. Stop filling the DEF tank immediately when
any of the following happen: DEF stops
flowing from the fill bottle into the DEF tank,
DEF splashes out the filler neck, or a DEF
pump nozzle automatically shuts off.
4. Reinstall cap onto DEF tank.
Filling The Def Tank In Cold Climates
Since DEF will begin to freeze at 12°F (-11°C),
your vehicle is equipped with an automatic DEF
heating system. This allows the DEF injection
CAUTION!
To avoid DEF spillage, and possible
damage to the DEF tank from overfilling, do
not “top off” the DEF tank after filling.
DO NOT OVERFILL. DEF will freeze below
12ºF (-11ºC). The DEF system is designed
to work in temperatures below the DEF
freezing point, however, if the tank is over -
filled and freezes, the system could be
damaged.
When DEF is spilled, clean the area imme -
diately with water and use an absorbent
material to soak up the spills on the ground.
Do not attempt to start your engine if DEF is
accidentally added to the diesel fuel tank
as it can result in severe damage to your
engine, including but not limited to failure
of the fuel pump and injectors.
Never add anything other than DEF to the
tank – especially any form of hydrocarbon
such as diesel fuel, fuel system additives,
gasoline, or any other petroleum-based
product. Even a very small amount of these,
less than 100 parts per million or less than
1 oz. per 78 Gallons (295 Liters) will
contaminate the entire DEF system and will
require replacement. If owners use a
container, funnel or nozzle when refilling
the tank, it should either be new or one that
is has only been used for adding DEF.
Mopar provides an attachable nozzle with
its DEF for this purpose.
CAUTION! (Continued)
5

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STARTING AND OPERATING345
After Driving Off-Road
Off-road operation puts more stress on your
vehicle than does most on-road driving. After
going off-road, it is always a good idea to check
for damage. That way you can get any problems
taken care of right away and have your vehicle
ready when you need it.
Completely inspect the underbody of your
vehicle. Check tires, body structure, steering,
suspension, and exhaust system for damage.
Inspect the radiator for mud and debris and
clean as required.
Check threaded fasteners for looseness,
particularly on the chassis, drivetrain compo -
nents, steering, and suspension. Retighten
them, if required, and torque to the values
specified in the Service Manual.
Check for accumulations of plants or brush.
These things could be a fire hazard. They
might hide damage to fuel lines, brake hoses,
axle pinion seals, and propeller shafts.
After extended operation in mud, sand,
water, or similar dirty conditions, have the
radiator, fan, brake rotors, wheels, brake
linings, and axle yokes inspected and
cleaned as soon as possible.If you experience unusual vibration after
driving in mud, slush or similar conditions,
check the wheels for impacted material.
Impacted material can cause a wheel imbal-
ance and freeing the wheels of it will correct
the situation.
WARNING!
Abrasive material in any part of the brakes
may cause excessive wear or unpredictable
braking. You might not have full braking
power when you need it to prevent a collision.
If you have been operating your vehicle in
dirty conditions, get your brakes checked and
cleaned as necessary.
5

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IN CASE OF EMERGENCY347

Assist And SOS Buttons

If equipped, the overhead console contains an
ASSIST and a SOS button. NOTE:
Your vehicle may be transmitting data as
authorized by the subscriber.
The SOS and ASSIST buttons will only func
-
tion if you are connected to an operable LTE
(voice/data) or 4G (data) network. Other
Uconnect services will only be operable if
your SiriusXM Guardian™ service is active
and you are connected to an operable LTE
(voice/data) or 4G (data) network.
ASSIST Call
The ASSIST Button is used to automatically
connect you to any one of the following support
centers:
Roadside Assistance – If you get a flat tire, or
need a tow, just push the ASSIST button and
you’ll be connected to someone who can
help. Roadside Assistance will know what
vehicle you’re driving and its location. Addi -
tional fees may apply for roadside assis -
tance.
SiriusXM Guardian™ Customer Care –
In-vehicle support for SiriusXM Guardian™.
Vehicle Customer Care – Total support for all
other vehicle issues.
SOS Call

1. Push the SOS Call button on the overhead console.

NOTE:
In case the SOS Call button is pushed in error,
there will be a 10 second delay before the SOS
Call system initiates a call to a SOS operator. To
cancel the SOS Call connection, push the SOS
call button on the overhead console or press
the cancellation button on the Device Screen.
Termination of the SOS Call will turn off the
green LED light on the overhead console.
2. The LED light located between the ASSIST and SOS buttons on the overhead console
will turn green once a connection to a SOS
operator has been made.
1 — ASSIST Button
2 — SOS Button
WARNING!
ALWAYS obey traffic laws and pay attention to
the road. ALWAYS drive safely with your hands
on the steering wheel. You have full
responsibility and assume all risks related to
the use of the features and applications in
this vehicle. Only use the features and
applications when it is safe to do so. Failure
to do so may result in an accident involving
serious injury or death.
6

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348IN CASE OF EMERGENCY
(Continued)
3. Once a connection between the vehicle and a SOS operator is made, the SOS Call
system may transmit the following
important vehicle information to a SOS
operator:
Indication that the occupant placed a
SOS Call.
The vehicle brand.
The last known GPS coordinates of the
vehicle.
4. You should be able to speak with the SOS operator through the vehicle audio system
to determine if additional help is needed. NOTE:
Your vehicle may be transmitting data as
authorized by the subscriber.
Once a connection is made between the
vehicle’s SOS Call system and the SOS oper
-
ator, the SOS operator may be able to open a
voice connection with the vehicle to deter -
mine if additional help is needed. Once the
SOS operator opens a voice connection with
the vehicle’s SOS Call system, the operator
should be able to speak with you or other
vehicle occupants and hear sounds occurring
in the vehicle. The vehicle’s SOS Call system
will attempt to remain connected with the
SOS operator until the SOS operator termi -
nates the connection.
5. The SOS operator may attempt to contact appropriate emergency responders and
provide them with important vehicle
information and GPS coordinates.
WARNING!
ALWAYS obey traffic laws and pay attention to
the road. ALWAYS drive safely with your hands
on the steering wheel. You have full
responsibility and assume all risks related to
the use of the features and applications in
this vehicle. Only use the features and
applications when it is safe to do so. Failure
to do so may result in an accident involving
serious injury or death.
WARNING!
If anyone in the vehicle could be in danger
(e.g., fire or smoke is visible, dangerous
road conditions or location), do not wait for
voice contact from an Emergency Services
Agent. All occupants should exit the vehicle
immediately and move to a safe location.
Never place anything on or near the
vehicle’s operable network and GPS
antennas. You could prevent operable
network and GPS signal reception, which
can prevent your vehicle from placing an
emergency call. An operable network and
GPS signal reception is required for the SOS
Call system to function properly.

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IN CASE OF EMERGENCY349
(Continued)
SOS Call System Limitations
Vehicles sold in Mexico DO NOT have SOS Call
system capabilities. SOS or other emergency line operators in
Mexico may not answer or respond to SOS
system calls.
If the SOS Call system detects a malfunction,
any of the following may occur at the time the
malfunction is detected, and at the beginning of
each ignition cycle:
The overhead console light located between
the ASSIST and SOS buttons will continuously
be illuminated red.
The Device Screen will display the following
message: “Vehicle device requires service.
Please contact an authorized dealer.”
An In-Vehicle Audio message will state
“Vehicle device requires service. Please
contact an authorized dealer.”
Even if the SOS Call system is fully functional,
factors beyond FCA US LLC’s control may
prevent or stop the SOS Call system operation.
These include, but are not limited to, the
following factors:Delayed accessories mode is active.
The ignition is in the OFF position.
The vehicle’s electrical systems are not
intact.
The SOS Call system software and/or hard
-
ware are damaged during a crash.
The vehicle battery loses power or becomes
disconnected during a vehicle crash.
The SOS Call system is embedded into the
vehicle’s electrical system. Do not add
aftermarket electrical equipment to the
vehicle’s electrical system. This may
prevent your vehicle from sending a signal
to initiate an emergency call. To avoid inter -
ference that can cause the SOS Call system
to fail, never add aftermarket equipment
(e.g., two-way mobile radio, CB radio, data
recorder, etc.) to your vehicle’s electrical
system or modify the antennas on your
vehicle. IF YOUR VEHICLE LOSES BATTERY
POWER FOR ANY REASON (INCLUDING
DURING OR AFTER AN ACCIDENT), THE
UCONNECT FEATURES, APPS AND
SERVICES, AMONG OTHERS, WILL NOT
OPERATE.
Modifications to any part of the SOS Call
system could cause the air bag system to
fail when you need it. You could be injured
if the air bag system is not there to help
protect you.
WARNING! (Continued)
WARNING!
Ignoring the overhead console light could
mean you will not have SOS Call services. If
the overhead console light is illuminated,
have an authorized dealer service the SOS
Call system immediately.
The Occupant Restraint Control module
turns on the air bag Warning Light on the
instrument panel if a malfunction in any
part of the system is detected. If the Air Bag
Warning Light is illuminated, have an
authorized dealer service the Occupant
Restraint Control system immediately.
WARNING! (Continued)
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IN CASE OF EMERGENCY351
BULB REPLACEMENT
REPLACEMENT BULBS
All of the inside bulbs are brass or glass-wedge base. Aluminum base bulbs are not approved.
Interior Bulbs
Bulb Name Bulb Number
Overhead Console Lamps TS 212–9
Dome Lamp 7679
For lighted switches, see an authorized dealer for replacement instructions.
Exterior Bulbs
Bulb Name Bulb Number
Low Beam (Halogen Reflector Headlamp) H11LL
High Beam (Halogen Reflector Headlamp) 9005LL
Low & High Beam (LED Reflector Headlamp) LED (Serviced At An Authorized Dealer)
Low & High Beam (LED Projector Headlamp) LED (Serviced At An Authorized Dealer)
Turn Signal / Front Position (Halogen Reflector Headlamp) 7444NA
Turn Signal / Front Position (LED Headlamps) LED (Serviced At An Authorized Dealer)
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352IN CASE OF EMERGENCY
Front Side Marker (Halogen Reflector Headlamp) W5W
Front Side Marker (LED Headlamps) LED (Serviced At An Authorized Dealer)
Front Fog Lamps (Halogen Reflector Headlamp) H11LL
Front Fog Lamps (LED Headlamps) LED (Serviced At An Authorized Dealer)
Side Indicators (Front And Side View Mirror) LED (Serviced At An Authorized Dealer)
Base Rear Tail/Turn and Stop Lamp 3157K
Premium Rear Tail/Turn and Stop Lamp LED (Serviced At An Authorized Dealer)
Premium Backup Lamp 7440/W21W
Center High Mounted Stop Lamp (CHMSL) 921
Cab Roof Marker Lamps 194NA
Rear Lamp Bar ID Marker Lamp 194
Side Marker Lamps (Dual Rear Wheels) 194
Backup Lamp 921
Rear License Plate Lamp 194
Exterior Bulbs
Bulb Name Bulb Number

20_DJD2_OM_EN_USC_t.book Page 352

IN CASE OF EMERGENCY355
4. Reach through the access hole of the wheel
house splash shield and disengage the side
marker socket by rotating counterclockwise
a quarter turn.

Side Marker 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
Please see an authorized dealer for service on
LED and Halogen front fog lamps. Halogen

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

2. Disconnect the fog lamp wiring harness connector from the fog lamp bulb.
3. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the housing.

Fog Lamp Bulb

4. Pull the bulb straight out from the housing.
Rear Tail/Stop, Turn Signal And Backup
Lamps

1. Remove the two screws and push pins that pass through the bed sheet metal.

Tail Lamp Locations

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.
1 — Tail Lamp
2 — Screws
3 — Fasteners
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