2019 RAM CHASSIS CAB wiring

352 STARTING AND OPERATING
NOTE:
• An aftermarket controller may be available for use with
trailers with air or electric-over-hydraulic trailer brake
systems. To determine the type of brakes on your trailer
and the availability of controllers, check with your trailer
manufacturer or dealer.
• Removal of the ITBM will cause errors and it may cause
damage to the electrical system and electronic modules of
the vehicle. See your authorized dealer if an aftermarket
module is to be installed.
Towing Requirements — Trailer Lights And Wiring
Whenever you pull a trailer, regardless of the trailer size,
stoplights and turn signals on the trailer are required for
motoring safety.
The Trailer Tow Package may include a four- and seven-pin
wiring harness. Use a factory approved trailer harness and
connector.
NOTE:
Do not cut or splice wiring into the vehicle’s wiring harness.
The electrical connections are all complete to the vehicle but
you must mate the harness to a trailer connector. Refer to the
following illustrations. NOTE:
• Disconnect trailer wiring connector from the vehicle
before launching a boat (or any other device plugged into
vehicle’s electrical connect) into water.
• Be sure to reconnect once clear from water area.
Four-Pin Connector1 — Female Pins 4 — Park
2 — Male Pin 5 — Left Stop/Turn
3 — Ground 6 — Right Stop/Turn

374 IN CASE OF EMERGENCY
(Continued)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 1/4 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
1. Open the hood.
2. Disconnect and isolate the negative battery cable.
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 counterclockwise.
5. Disconnect the internal lamp wiring harness connector
from the high beam bulb.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 replace -
ment. An incorrect bulb size or type may overheat and
cause damage to the lamp, the bulb socket, or the lamp
wiring. CAUTION! (Continued)

IN CASE OF EMERGENCY 375
6. Rotate the bulb counterclockwise 1/4 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.
Front Park And Turn
1. Open the hood.
2. Disconnect and isolate the negative battery cable.
3. Look under the hood and behind the headlamp to find
the park and turn socket. Park And Turn Socket
4. Reach behind the headlamp and unlock the park and turn
socket from the lamp by rotating counterclockwise ¼
turn.
5. Pull the 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.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 replace -
ment. An incorrect bulb size or type may overheat and
cause damage to the lamp, the bulb socket, or the lamp
wiring.
6

IN CASE OF EMERGENCY 377
Fog Lamps — If Equipped
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 ¼ turn to unlock the
bulb from the housing.
4. Pull the bulb straight out from the housing. Center High-Mounted Stoplamp (CHMSL) With Cargo
Lamp
1. Remove the two screws holding the housing/lens to the
body as shown.
CHMSL Mounting Screw LocationsCAUTION!
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.
6

378 IN CASE OF EMERGENCY
2. Separate the connector holding the housing and wiring
harness to the body.
CHMSL Connector Location
3. Turn the desired bulb socket ¼ turn and remove the
socket and bulb from housing.
4. Pull the desired bulb straight from the socket. CHMSL Bulb And Socket
• Outside Bulbs: Cargo Lamps
• Inside Bulb: Center High-Mounted Stop Lamp
5. Reverse the procedure for installation of bulbs and
housing. 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.

602
Load Capacity .............................................................. 450, 451
Pressure Monitoring System (TPMS) ....................... 152, 177
Quality Grading .................................................................. 468
Radial .................................................................................... 456
Replacement......................................................................... 459
Rotation ................................................................................ 466
Safety............................................................................. 444, 454
Sizes....................................................................................... 446
Snow Tires ............................................................................ 461
Spare Tires .................................................................... 461, 463
Spinning................................................................................ 457
Trailer Towing ..................................................................... 347
Tread Wear Indicators ........................................................ 458
Wheel Nut Torque .............................................................. 476
To Open Hood ........................................................................... 95
Tongue Weight/Trailer Weight ............................................ 345
Torque Converter Clutch ....................................................... 263
Towing.............................................................................. 339, 406
Disabled Vehicle.................................................................. 406
Guide..................................................................................... 345
Recreational.......................................................................... 358
Weight................................................................................... 345
Towing Behind A Motorhome .............................................. 358
Traction..................................................................................... 363
Traction Control ...................................................................... 166
Traction Control Switch ......................................................... 166 Trailer Sway Control (TSC) ................................................... 170
Trailer Towing .........................................................................339
Cooling System Tips ........................................................... 354
Hitches ..................................................................................344
Minimum Requirements ....................................................346
Mirrors ....................................................................................61
Tips ........................................................................................353
Trailer And Tongue Weight...............................................345
Wiring ...................................................................................352
Trailer Towing Guide .............................................................345
Trailer Weight ..........................................................................345
Transfer Case ...........................................................................444
Electronically Shifted ..........................................................272
Fluid ...................................................................................... 486
Transmission ............................................................................265
Automatic .............................................................256, 265, 439
Fluid ...................................................................................... 486
Maintenance .........................................................................439
Shifting ..................................................................................254
Transporting Pets .................................................................... 240
Tread Wear Indicators ............................................................ 458
Turn Signals ...............................................................70, 157, 373
U
Uconnect
Uconnect Settings ................490, 497, 500, 519, 522, 539, 541

INSTALLATION OF RADIO TRANSMITTING
EQUIPMENT
Special design considerations are incorporated into this
vehicle’s electronic system to provide immunity to radio
frequency signals. Mobile two-way radios and telephone
equipment must be installed properly by trained person-
nel. The following must be observed during installation.
The positive power connection should be made directly
to the battery and fused as close to the battery as possible.
The negative power connection should be made to body
sheet metal adjacent to the negative battery connection.
This connection should not be fused.
Antennas for two-way radios should be mounted on the
roof or the rear area of the vehicle. Care should be used
in mounting antennas with magnet bases. Magnets may
affect the accuracy or operation of the compass on
vehicles so equipped.
The antenna cable should be as short as practical and
routed away from the vehicle wiring when possible. Use
only fully shielded coaxial cable.
Carefully match the antenna and cable to the radio to
ensure a low Standing Wave Ratio (SWR). Mobile radio equipment with output power greater than
normal may require special precautions.
All installations should be checked for possible interfer-
ence between the communications equipment and the
vehicle’s electronic systems.
WARNING:
Operating, servicing and maintaining a
passenger vehicle or off-road highway
motor vehicle can expose you to chemicals
including engine exhaust, carbon monoxide,
phthalates, and lead, which are known to
the State of California to cause cancer and
birth defects or other reproductive harm.
To minimize exposure, avoid breathing
exhaust, do not idle the engine except as
necessary, service your vehicle in a
well-ventilated area and wear gloves or
wash your hands frequently when servicing
your vehicle. For more information go to
www.P65Warnings.ca.gov/passenger-vehicle.VEHICLES SOLD IN CANADA
With respect to any Vehicles Sold in Canada, the name
FCA US LLC shall be deemed to be deleted and the name
FCA Canada Inc. used in substitution therefore.
DRIVING AND ALCOHOL
Drunken driving is one of the most frequent causes of
accidents.
Your driving ability can be seriously impaired with blood
alcohol levels far below the legal minimum. If you are
drinking, don’t drive. Ride with a designated non-
drinking driver, call a cab, a friend, or use public trans-
portation.
WARNING!
Driving after drinking can lead to an accident.
Your perceptions are less sharp, your reflexes are
slower, and your judgment is impaired when you
have been drinking. Never drink and then drive. This manual illustrates and describes the operation of
features and equipment that are either standard or op-
tional on this vehicle. This manual may also include a
description of features and equipment that are no longer
available or were not ordered on this vehicle. Please
disregard any features and equipment described in this
manual that are not on this vehicle.
FCA US LLC reserves the right to make changes in design
and specifications, and/or make additions to or improve-
ments to its products without imposing any obligation
upon itself to install them on products previously manu-
factured.
Copyright © 2018 FCA US LLCCopyright © 2019 FCA US LLC