light Ram 1500 2018 Repair Manual

To Decrease Speed
When the Speed Control is set, you can de-
crease speed by pushing the SET (-) button.
The driver’s preferred units can be selected
through the instrument panel settings if
equipped. Refer to “Getting To Know Your
Instrument Panel” in the Owner’s Manual for
more information. The speed increment
shown is dependent on the selected speed
unit of U.S. (mph) or Metric (km/h):
U.S. Speed (mph)
• Pushing the SET (-) button once will resultin a 1 mph decrease in set speed. Each
subsequent tap of the button results in a
decrease of 1 mph.
• If the button is continually pushed, the set speed will continue to decrease until the
button is released, then the new set speed
will be established.
Metric Speed (km/h)
• Pushing the SET (-) button once will result in a 1 km/h decrease in set speed. Each
subsequent tap of the button results in a
decrease of 1 km/h. • If the button is continually pushed, the set
speed will continue to decrease until the
button is released, then the new set speed
will be established.
To Accelerate For Passing
Press the accelerator as you would normally.
When the pedal is released, the vehicle will
return to the set speed.
Using Speed Control On Hills
The transmission may downshift on hills to
maintain the vehicle set speed.
NOTE:
The Speed Control system maintains speed
up and down hills. A slight speed change on
moderate hills is normal.
On steep hills, a greater speed loss or gain
may occur so it may be preferable to drive
without Speed Control.
WARNING!
Speed Control can be dangerous where the
system cannot maintain a constant speed.
Your vehicle could go too fast for the con-
WARNING!
ditions, and you could lose control and
have an accident. Do not use Speed Con-
trol in heavy traffic or on roads that are
winding, icy, snow-covered or slippery.
To Resume Speed
To resume a previously set speed, push the
RES (+) button and release. Resume can be
used at any speed above 20 mph (32 km/h).
To Deactivate
A soft tap on the brake pedal, pushing the
CANCEL button, or normal brake pressure
while slowing the vehicle will deactivate the
Speed Control without erasing the set speed
from memory.
Pushing the ON/OFF button or turning the
ignition switch OFF erases the set speed from
memory.STARTING AND OPERATING
178

REFUELING THE VEHICLE — GAS
ENGINE
The fuel filler cap (gas cap) is located behind
the fuel filler door, on the left side of the
vehicle. Open the fuel door and remove the
fuel cap by turning it counter-clockwise.
NOTE:
When removing the fuel filler cap, lay the cap
tether in the hook, located on the fuel filler
door.
WARNING!
• Never have any smoking materials lit inor near the vehicle when the gas cap is
removed or the tank is being filled.
• Never add fuel to the vehicle when the
engine is running.
• A fire may result if gasoline is pumped
into a portable container that is inside of
a vehicle. You could be burned. Always
place gas containers on the ground while
filling.
CAUTION!
• Damage to the fuel system or emissionscontrol system could result from using
an improper fuel tank filler tube cap.
• A poorly fitting fuel filler cap could let
impurities into the fuel system.
• A poorly fitting fuel filler cap may cause
the “Malfunction Indicator Light (MIL)”
to turn on.
• To avoid fuel spillage and overfilling, do
not “top off” the fuel tank after filling.
When the fuel nozzle “clicks” or shuts
off, the fuel tank is full.
NOTE:
• When the fuel nozzle “clicks” or shuts off, the fuel tank is full.
• Tighten the gas cap until you hear a “click- ing” sound. This is an indication that the
gas cap is tightened properly. The MIL in
the instrument cluster may turn on if the
gas cap is not secured properly. Make sure
that the gas cap is tightened each time the
vehicle is refueled.
WARNING!
Static electricity can cause an ignition of
flammable liquid, vapor or gas in any ve-
hicle or trailer. To reduce risk of serious
injury or death when filling containers:
• Always place container on the ground before filling.
• Keep the pump nozzle in contact with
the container when you are filling it.
• Use only approved containers for flam-
mable liquid.
• Do not leave container unattended while
filling.
• A static electric charge could cause a
spark and fire hazard.
181

2. Insert funnel into same filler pipe openingas the fuel nozzle.
NOTE:
Ensure funnel is inserted fully to hold
flapper door open. 3. Pour fuel into funnel opening.
4. Remove funnel from filler pipe, clean off
prior to putting back in the jack kit.
WARNING!
• Never have any smoking materials lit inor near the vehicle when the fuel door is
open or the tank is being filled.
• Never add fuel when the engine is run-
ning. This is in violation of most state
and federal fire regulations and may
cause the “Malfunction Indicator Light”
to turn on.
• A fire may result if fuel is pumped into a
portable container that is inside of a
vehicle. You could be burned. Always
place fuel containers on the ground
while filling.
CAUTION!
To avoid fuel spillage and overfilling, do
not “top off” the fuel tank after filling.
Diesel Exhaust Fluid
Your vehicle is equipped with a Selective
Catalytic Reduction system to meet the very
stringent diesel emissions standards required
by the Environmental Protection Agency.
The purpose of the SCR system is to reduce
levels of NOx (oxides of nitrogen emitted from
engines) that are harmful to our health and
the environment to a near-zero level. Small
quantities of Diesel Exhaust Fluid (DEF) is
injected into the exhaust upstream of a cata-
lyst where, when vaporized, it converts smog-
forming nitrogen oxides (NOx) into harmless
nitrogen (N2) and water vapor (H2O), two
natural components of the air we breathe.
You can operate with the comfort that your
vehicle is contributing to a cleaner, healthier
world environment for this and generations to
come.
System Overview
This vehicle is equipped with a Diesel Ex-
haust Fluid (DEF) injection system and a
Selective Catalytic Reduction (SCR) catalyst
to meet the emission requirements.
Fill Locations And Funnel Useage
1 — Diesel Exhaust Fluid (DEF) Fill
Location
2 — Diesel Fuel Fill Location
3 — Emergency Diesel Fuel Fill Funnel
183

2. Insert the fuel nozzle fully into the fillerpipe – the nozzle opens and holds the
flapper door while refueling.
3. Fill the vehicle with fuel – when the fuel nozzle “clicks” or shuts off the fuel tank is
full.
4. Remove the fuel nozzle and close the fuel door.
Emergency Fuel Can Refueling
Most fuel cans will not open the flapper door.
A funnel is provided to open the flapper door
to allow emergency refueling with a fuel can.
1. Retrieve fuel funnel from the jack kit located under the front passenger seat.
2. Insert funnel into same filler pipe opening as the fuel nozzle.
NOTE:
Ensure funnel is inserted fully to hold
flapper door open.
3. Pour fuel into funnel opening. 4. Remove funnel from filler pipe, clean off
prior to putting back in the jack kit.
WARNING!
• Never have any smoking materials lit inor near the vehicle when the fuel door is
open or the tank is being filled.
• Never add fuel when the engine is run-
ning. This is in violation of most state
and federal fire regulations and may
cause the “Malfunction Indicator Light”
to turn on.
• A fire may result if fuel is pumped into a
portable container that is inside of a
vehicle. You could be burned. Always
place fuel containers on the ground
while filling.
CAUTION!
To avoid fuel spillage and overfilling, do
not “top off” the fuel tank after filling.
Fill Locations And Funnel Useage
1 — Diesel Exhaust Fluid (DEF) Fill
Location
2 — Diesel Fuel Fill Location
3 — Emergency Diesel Fuel Fill Funnel
187

The user interface consists of the following:
Manual Brake Control Lever
Slide the manual brake control lever to the
left to activate power to the trailer's electric
brakes independent of the tow vehicle's
brakes. If the manual brake control lever isactivated while the brake is also applied, the
greater of the two inputs determines the
power sent to the trailer brakes.
The trailer and the vehicle's brake lamps will
come on when either vehicle braking or
manual trailer brakes are applied.
Trailer Brake Status Indicator Light
This light indicates the trailer electrical con-
nection status.
If no electrical connection is detected after
the ignition is turned on, pushing the GAIN
adjustment button or sliding the manual
brake control lever will display the GAIN
setting for 10 seconds and the “Trailer Brake
Status Indicator Light” will not be displayed.
If a fault is detected in the trailer wiring or the
Integrated Trailer Brake Module (ITBM), the
“Trailer Brake Status Indicator Light” will
flash.
GAIN Adjustment Buttons (+/-)
Pushing these buttons will adjust the brake
control power output to the trailer brakes in
0.5 increments. The GAIN setting can be
increased to a maximum of 10 or decreased
to a minimum of 0 (no trailer braking).
GAIN
The GAIN setting is used to set the trailer
brake control for the specific towing condi-
tion and should be changed as towing condi-
tions change. Changes to towing conditions
include trailer load, vehicle load, road condi-
tions and weather.
Adjusting GAIN
NOTE:
This should only be performed in a traffic free
environment at speeds of approximately 20–
25 mph (30–40 km/h).
1. Make sure the trailer brakes are in good
working condition, functioning normally
and properly adjusted. See your trailer
dealer if necessary.
Adjustment Buttons
1 — Decrease (-)
2 — Increase (+)
193

2. Hook up the trailer and make the electri-cal connections according to the trailer
manufacturer's instructions.
3. When a trailer with electric/EOH brakes is plugged in, the trailer connected message
should appear in the instrument cluster
display (if the connection is not recog-
nized by the ITBM, braking functions will
not be available), the GAIN setting will
illuminate and the correct type of trailer
must be selected from the instrument
cluster display options. 4. Push the UP or DOWN button on the
steering wheel until “TRAILER TOW” ap-
pears on the screen.
5. Push the RIGHT arrow on the steering wheel to enter “TRAILER TOW”.
6. Push the UP or DOWN buttons until the Trailer Brake Type appears on the screen.
7. Push the RIGHT arrow and then push the UP or DOWN buttons until the proper
Trailer Brake Type appears on the screen.
8. In a traffic-free environment, tow the trailer on a dry, level surface at a speed of 20–25 mph (30–40 km/h) and squeeze
the manual brake control lever
completely.
9. If the trailer wheels lockup (indicated by squealing tires), reduce the GAIN setting;
if the trailer wheels turn freely, increase
the GAIN setting.
Repeat steps 8 and 9 until the GAIN setting
is at a point just below trailer wheel lockup. If
towing a heavier trailer, trailer wheel lockup
may not be attainable even with the maxi-
mum GAIN setting of 10.
Light Electric Heavy ElectricLight EOHHeavy EOH
Type of Trailer Brakes Electric Trailer Brakes Electric Trailer Brakes Electric over Hydraulic Trailer BrakesElectric over Hydraulic
Trailer Brakes
Load *Under 10,000 lbs *Above 10,000 lbs *Under 10,000 lbs *Above 10,000 lbs
* The suggested selection depends and may
change depending on the customer prefer-
ences for braking performance. Condition of
the trailer brakes, driving and road state may
also affect the selection. Display Messages
The trailer brake control interacts with the
instrument cluster display. Display mes-
sages, along with a single chime, will be
displayed when a malfunction is determined
in the trailer connection, trailer brake con- trol, or on the trailer. Refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further information.
CAUTION!
Connecting a trailer that is not compatible
with the ITBM system may result in re-
STARTING AND OPERATING
194

The NEUTRAL (N) indicator light will
blink while the shift is in progress. The
light will stop blinking (stay on solid)
when the shift to NEUTRAL (N) is com-
plete. After the shift is completed and
the NEUTRAL (N) light stays on, re-
lease the NEUTRAL (N) button.
6. Release the parking brake.
7. Shift the transmission into REVERSE.
8. Release the brake pedal (and clutch pedal on manual transmissions) for five seconds
and ensure that there is no vehicle
movement.
9. Repeat steps 7 and 8 with automatic transmission in DRIVE or manual trans-
mission in first gear.
10. Shift the transmission to NEUTRAL. Firmly apply the parking brake. Turn OFF
the engine. For vehicles with Keyless
Enter-N-Go, push and hold the ENGINE
START/STOP button until the engine
shuts off.
11. Shift the transmission into PARK or place manual transmission in gear (NOT in Neutral). On 8-speed transmissions
the shifter will automatically select
PARK when the engine is turned off.
12. Turn the ignition to the OFF mode, then cycle the ignition to the RUN mode and
back to the OFF mode. Remove the key
fob from the ignition.
13. Attach the vehicle to the tow vehicle using a suitable tow bar.
14. Release the parking brake.
NOTE:
With electronic shift transfer case:
• Steps 2 through 4 are requirements that must be met before pushing the NEUTRAL
(N) button, and must continue to be met
until the shift has been completed. If any of
these requirements are not met before
pushing the NEUTRAL (N) button or are no
longer met during the shift, the NEUTRAL
(N) indicator light will flash continuously
until all requirements are met or until the
NEUTRAL (N) button is released. • The ignition must be in the ON/RUN mode
for a shift to take place and for the position
indicator lights to be operable. If the igni-
tion is not in the ON/RUN mode, the shift
will not take place and no position indicator
lights will be on or flashing.
• A flashing NEUTRAL (N) position indicator light indicates that shift requirements have
not been met.
• If the vehicle is equipped with air suspen- sion, the engine should be started and left
running for a minimum of 60 seconds (with
all the doors closed) at least once every
24 hours. This process allows the air sus-
pension to adjust the vehicle’s ride height
to compensate for temperature effects.
Shifting Out Of NEUTRAL (N)
Use the following procedure to prepare your
vehicle for normal usage:
1. Bring the vehicle to a complete stop, leav-
ing it connected to the tow vehicle.
2. Firmly apply the parking brake.
3. Press and hold the brake pedal.
199

4. Start the engine. Shift the transmissioninto NEUTRAL. Depress the clutch pedal
on a manual transmission.
• With manual shift transfer case, shift the transfer case lever to the desired
position.
• With electronic shift transfer case with rotary selector switch, push and hold
the transfer case NEUTRAL (N) button
until the NEUTRAL (N) indicator light
turns off. After the NEUTRAL (N) indi-
cator light turns off, release the NEU-
TRAL (N) button. After the NEUTRAL
(N) button has been released, the
transfer case will shift to the position
indicated by the selector switch.
• With electronic shift transfer case with push-button selector switch, push and
hold the switch for the desired transfer
case position, until the NEUTRAL (N)
indicator light turns off and the desired
position indicator light turns on. NOTE:
When shifting out of transfer case NEUTRAL
(N), turning the engine OFF is not required,
but may be helpful to avoid gear clash. With
the 8-speed automatic transmission, the en-
gine must remain running, since turning the
engine OFF will shift the transmission to
PARK (and the transmission must be in NEU-
TRAL for the transfer case to shift out of
NEUTRAL).
5. Turn the engine OFF. Shift automatic
transmission into PARK. On 8-speed
transmissions the shifter will automati-
cally select PARK when the engine is
turned off.
6. Release the brake pedal (and clutch pedal on a manual transmission).
7. Disconnect vehicle from the tow vehicle.
8. Start the engine.
9. Press and hold the brake pedal.
10. Release the parking brake.
11. Shift the transmission into gear, release the brake pedal (and clutch pedal on
manual transmissions), and check that
the vehicle operates normally. NOTE:
With electronic shift transfer case:
• Steps 3 and 4 are requirements that must
be met before pushing the button to shift
out of NEUTRAL (N), and must continue to
be met until the shift has been completed.
If any of these requirements are not met
before pushing the button or are no longer
met during the shift, the NEUTRAL (N)
indicator light will flash continuously until
all requirements are met or until the button
is released.
• The ignition must be in the ON/RUN mode for a shift to take place and for the position
indicator lights to be operable. If the igni-
tion is not in the ON/RUN mode, the shift
will not take place and no position indicator
lights will be on or flashing.
• A flashing NEUTRAL (N) position indicator light indicates that shift requirements have
not been met.
STARTING AND OPERATING
200

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located
on the upper switch bank just below the
radio.
Push the switch to turn on the Hazard Warn-
ing flasher. When the switch is activated, all
directional turn signals will flash on and off to
warn oncoming traffic of an emergency. Push
the switch a second time to turn off the
Hazard Warning flashers.
This is an emergency warning system and it
should not be used when the vehicle is in
motion. Use it when your vehicle is disabled
and it is creating a safety hazard for other
motorists.
When you must leave the vehicle to seek
assistance, the Hazard Warning flashers will
continue to operate even though the ignition
is placed in the OFF position.
NOTE:
With extended use the Hazard Warning flash-
ers may wear down your battery.
BULB REPLACEMENT
Replacement Bulbs
All of the inside bulbs are brass or glass-
wedge base. Aluminum base bulbs are not
approved.
Interior Bulbs
Bulb Number
Overhead Console
Lamps TS 212–9
Dome Lamp 7679
For lighted switches, see your authorized
dealer for replacement instructions.
Exterior Bulbs
Bulb Number
Base Quad Head-
lamp – Low Beam H11LL
Base Quad Head-
lamp – High Beam 9005LL
Front Turn Signal
Lamp (Base Quad
Headlamp) 3157NA
Bulb Number
Premium Bi Halogen
Projector Headlamp -
Low Beam 9005Sl+
Premium Bi Halogen
Projector Headlamp -
High Beam 9005LL
Front Turn Signal
Lamp (Premium
Headlamp) LED (Serviced at au-
thorized dealer)
Fog Lamp (Horizontal
shape) 9145
Fog Lamp (Vertical
shape) 9006
Center High Mounted
Stop Lamp (CHMSL) 921K
Rear Cargo Lamp 921
LED Center High
Mounted Stop Lamp
(CHMSL)/Cargo
Lamp LED (Serviced at au-
thorized dealer)
Cab Roof Marker
Lamps 194NA
Base Rear Tail/Turn
and Stop Lamp 3157K
Premium Rear Tail/
Turn and Stop Lamp LED (Serviced at au-
thorized dealer)
IN CASE OF EMERGENCY
202

CavityCartridge Fuse Micro Fuse Description
F07 40 Amp Green – Starter Solenoid
F08 20 Amp Blue (1500 LD/
Cummins Diesel) –
Emissions Diesel – If Equipped
F09 40 Amp Green (Special
Services Vehicle & Cum- mins Diesel) –
Diesel Fuel Heater – If Equipped
F10 40 Amp Green –Body Controller / Exterior Lighting #2
F10 50 Amp Red –Body Controller / Exterior Lighting #2 – If Equipped with
Stop/Start
F11 30 Amp Pink –Integrated Trailer Brake Module – If Equipped
F12 40 Amp Green –Body Controller #3 / Power Locks
F13 40 Amp Green – Blower Motor
F14 40 Amp Green –Body Controller #4 / Interior Lighting
F16 30 Amp Pink –Smart Bar – If Equipped
F19 20 Amp Blue (1500 LD
Diesel)
30 Amp Pink (Cummins Diesel) –
SCR – If Equipped
F20 30 Amp Pink –Passenger Door Module
F21 30 Amp Pink –Drive Train Control Module
F22 20 Amp Blue
30 Amp Pink (Cummins Diesel) –
Engine Control Module
F23 30 Amp Pink –Body Controller #1 / Interior Lighting
F24 30 Amp Pink –Driver Door Module
IN CASE OF EMERGENCY
204