2019 Ram 3500 Chassis Cab air suspension

354 STARTING AND OPERATING
If you regularly tow a trailer for more than 45 minutes of
continuous operation, then change the automatic transmis-
sion fluid and filter(s) as specified for "police, taxi, fleet, or
frequent trailer towing." Refer to the “Maintenance Plan” for
the proper maintenance intervals.
NOTE:
Check the automatic transmission fluid level before towing
(Six-speed automatic only).
Tow/Haul Mode
To reduce potential for automatic transmission overheating,
activate TOW/HAUL mode when driving in hilly areas, or
select a lower gear range (using the Electronic Range Select
(ERS) shift control) on more severe grades.
Speed Control — If Equipped
• Do not use on hilly terrain or with heavy loads.
• When using the speed control, if you experience speed drops greater than 10 mph (16 km/h), disengage until you
can get back to cruising speed.
• Use speed control in flat terrain and with light loads to maximize fuel efficiency. Cooling System
To reduce potential for engine and transmission over
-
heating, take the following actions:
City Driving
• In city traffic — while stopped, place the transmission in NEUTRAL, but do not increase engine idle speed.
Highway Driving
• Reduce speed.
• Temporarily turn off air conditioning.
Air Suspension System
To aid in attaching/detaching the trailer from the vehicle,
the air suspension system can be used. Refer to “Air Suspen -
sion System” in “Starting And Operating” for further infor -
mation.
NOTE:
The vehicle must remain in the engine running position
while attaching a trailer for proper leveling of the air suspen -
sion system.

IN CASE OF EMERGENCY 381
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 FuseDescription
F01 80 Amp Black –Rad Fan Control Module – If Equipped (DS 1500 Only)
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 (HD Only)
F05 40 Amp Green
50 Amp Red (Special
Services Vehicle (SSV)) –
Compressor For Air Suspension – If Equipped
F06 40 Amp Green –ABS Pump Motor (DS 1500 Only)
F07 40 Amp Green –Starter Solenoid
6

IN CASE OF EMERGENCY 385
F50–20 Amp Yellow Air Suspension Control Module – If Equipped
F51 –10 Amp Red Ignition Node Module / Keyless Ignition Node Module,
Radio Frequency Hub Module / Electric Steering
Column Lock - If Equipped
F52 –5 Amp Tan Battery Sensor
F53 –20 Amp Yellow Trailer Tow – Left Turn/Stop Lights - If Equipped
F54 –20 Amp Yellow Non Memory Adjustable Pedals - If Equipped
F56 –15 Amp Blue Additional Diesel Content - If Equipped (DS 1500 Only)
F57 –20 Amp Yellow TCM/PCM / Solenoid Trans Pressure SW (RFE Trans
Only) – If Equipped (HD Only)
Transmission (DS 1500 Only)
F58 –10 Amp Red Bed Lighting (LED) – If Equipped (HD Only)
F60 –15 Amp Blue Underhood Lamp / TCM – If Equipped (DS 1500 Only)
F61 –10 Amp Red UREA Sensor / PM Sensor – If Equipped (DS 1500 LD
Diesel & Cummins Diesel)
F62 –10 Amp Red Air Conditioning Clutch
F63 –20 Amp Yellow Ignition Coils (Gas), Ignition Coils Capacitors (Gas) /
Short Runner Valve Actuator / Urea Heater Control
Unit (DS 1500 LD Diesel) / RLY Coil Feed-SCR (DS 1500
LD Diesel)
Cavity Cartridge Fuse
Micro FuseDescription
6

388 IN CASE OF EMERGENCY
F80–10 Amp Red Universal Garage Door Opener / Compass /
Anti-Intrusion Module (DS 1500 Only)
ASSY Overhead Console / SW Assist / SW 911 – If
Equipped (HD Only)
F81 –20 Amp Yellow Trailer Tow Right Turn / Stop Lights - If Equipped
F82 –10 Amp Red Steering Column Control Module / Cruise Control
F83 – –No Connection
F84 –15 Amp Blue ASBM / HVAC / ICS / Rear Heated Seat Switches
F85 –10 Amp Red Airbag Module
F86 –10 Amp Red Airbag Module
F87 –10 Amp Red Air Suspension / ITBM / Steering Column Control
Module / MOD Gateway CAN-C Trailer TPM (HD
Only)
Air Suspension / Trailer Tow / DC/DC Converter
(Voltage Stabilizer) / Steering Column Control Module
/ Occupant Classification Sensor (DS 1500 Only)
F88 –15 Amp Blue Instrument Panel Cluster
F90/F91 –20 Amp Yellow IGN or BATT Customer Selectable – If Equipped
(HD Only)
Power Outlet (Rear Seats) Customer Selectable (DS 1500
Only)
F93 –20 Amp Yellow Cigar Lighter - If Equipped
Cavity Cartridge Fuse
Micro FuseDescription

412 SERVICING AND MAINTENANCE
Mileage or time passed
(whichever comes first)
20,000
30,000
40,00050,000
60,000
70,000
80,00090,000
100,000
110,000120,000130,000140,000150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000 48,000
64,00080,000
96,000
112,000
128,000144,000160,000
176,000192,000208,000224,000240,000
Additional Inspections
Inspect the CV/Universal joints. X XX X X
Inspect front suspension, tie rod
ends, and replace if necessary. X
X X
XX XX
Inspect the front and rear axle
surfaces. If gear oil leakage is
suspected, check the fluid level.
If using your vehicle for police,
taxi, fleet, off-road or frequent
trailer towing, change axle fluid. X X X
XX XX
Inspect the brake linings,
parking brake function. X X X
XX XX
Additional Maintenance
Replace engine air filter. XX X X X
Replace spark plugs.
1 X

SERVICING AND MAINTENANCE 459
(Continued)
NOTE:
Wheel Valve Stem must be replaced as well when installing
new tires due to wear and tear in existing tires.
Keep dismounted tires in a cool, dry place with as little expo-
sure to light as possible. Protect tires from contact with oil,
grease, and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for wear
and correct cold tire inflation pressures. The manufacturer
strongly recommends that you use tires equivalent to the
originals in size, quality and performance when replacement
is needed. Refer to the paragraph on “Tread Wear Indica -
tors” in this section. Refer to the Tire and Loading Informa -
tion placard or the Vehicle Certification Label for the size
designation of your tire. The Load Index and Speed Symbol
for your tire will be found on the original equipment tire
sidewall.
See the Tire Sizing Chart example found in the “Tire Safety
Information” section of this manual for more information
relating to the Load Index and Speed Symbol of a tire. It is recommended to replace the two front tires or two rear
tires as a pair. Replacing just one tire can seriously affect
your vehicle’s handling. If you ever replace a wheel, make
sure that the wheel’s specifications match those of the orig
-
inal wheels.
It is recommended you contact an authorized tire dealer or
original equipment dealer with any questions you may have
on tire specifications or capability. Failure to use equivalent
replacement tires may adversely affect the safety, handling,
and ride of your vehicle.
WARNING!
• Do not use a tire, wheel size, load rating, or speed rating other than that specified for your vehicle. Some combi -
nations of unapproved tires and wheels may change
suspension dimensions and performance characteris -
tics, resulting in changes to steering, handling, and
braking of your vehicle. This can cause unpredictable
handling and stress to steering and suspension compo -
nents. You could lose control and have a collision
resulting in serious injury or death. Use only the tire
and wheel sizes with load ratings approved for your
vehicle.
7

MULTIMEDIA 501
Suspension — If Equipped
After pressing the “Suspension” button on the touchscreen, the following settings will be available:Setting Name Selectable Options
Auto Entry/Exit Suspension OnOff
NOTE:
When the “Auto Entry/Exit Suspension” feature is selected, the vehicle automatically lowers from ride height position when
vehicle shifted to park for easy entry/exit. Display Suspension Messages AllWarning Only
Tire Jack Mode OnOff
NOTE:
When this feature is selected the air suspension system is disabled to prevent auto leveling of the suspension, while the
vehicle is on a jack changing a tire. Transport Mode OnOff
NOTE:
When the “Transport Mode” feature is selected, the air suspension system is disabled to assist with flat bed towing. Wheel Alignment Mode OnOff
NOTE:
The “Wheel Alignment Mode” feature prevents auto leveling of the air suspension while performing a wheel alignment
service. Before performing a wheel alignment, this mode must be enabled. Refer to an authorized dealer for further informa -
tion.
9

MULTIMEDIA 523
Air Suspension — If Equipped
After pressing the “Suspension” button on the touchscreen, the following settings will be available:Headlight Off Delay
–+
NOTE:
When the “Headlight Off Delay” feature is selected, the driver can choose to have the headlights remain on for 0, 30, 60, or
90 seconds when exiting the vehicle. Setting Name
Selectable Options
Setting NameSelectable Options
Display Suspension Messages All
Warnings Only
Tire Jack Mode On Off
NOTE:
When the “Tire Jack Mode” feature is selected, the air suspension system is disabled to assist with changing a spare tire. Transport Mode On Off
NOTE:
When the “Transport Mode” feature is selected, the air suspension system lowers and then disables to assist with flat bed
towing. Wheel Alignment Mode On Off
9