2007 RAM CHASSIS CAB service

CAUTION!Do not leave your vehicle unattended with the
engine running as you would not be able to react to
the temperature indicator if the engine overheats.
NOTE: Engine idle speed will automatically increase to
1000 rpm at elevated coolant temperatures to improve
engine cooling.
NOTE: If the gauge pointer moves to either extreme of
the gauge, the “Check Gages” indicator will illuminate
and a single chime will sound.
14. Security Light
The light will flash rapidly for approximately 16 seconds
when the vehicle theft alarm is arming. The light will
flash at a slower rate after the alarm is set. The security
light will also come on for about two seconds when the
ignition is first turned ON. 15. Transmission Range Indicator (Automatic
Transmissions Only)
When the gear selector lever is moved, this indicator
shows the automatic transmission gear range selected.
16. Odometer/Trip Odometer
The odometer shows the total distance the vehicle has
been driven.
If the odometer reading is changed during repair or
replacement, be sure to keep a record of the reading
before and after the service so that the correct mileage can
be determined.
The trip odometer shows individual trip mileage. To
toggle between the odometer and the trip odometer,
press the Odometer/Trip Odometer Button. To reset the
Trip Odometer, press and hold the button while in trip
mode, until the Trip Odometer resets. UNDERSTANDING YOUR INSTRUMENT PANEL 175
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NOTE: The odometer/trip odometer Vacuum Fluores-
cent Display may also display “gascap”, which indicates
that your gas cap is possibly loose or damaged.
The Vacuum Fluorescent Display will also display “no-
fuse”, which indicates that the IOD fuse is removed from
the Integrated Power Module.
NOTE: There is also an engine hour function. This
indicates the total number of hours the engine has been
running. To display the engine hours perform the follow-
ing: Place the ignition in RUN, but do not start the
engine. With the odometer value displayed, hold the trip
button down for a period of 6 seconds. The odometer will
change to trip value first, then it will display the engine
hour value. The engine hours will be displayed for a
period of 30 seconds until the ignition is turned off or the
engine is started. 17. Check Gages Light
This light is part of an onboard diagnostic system
which monitors the emissions and engine control
system. If the vehicle is ready for emissions
testing the light will come on when the ignition is first
turned on and remain on, as a bulb check, until the
engine is started. If the vehicle is not ready for emissions
testing the light will come on when the ignition is first
turned on and remain on for 15 seconds, then blink for 5
seconds, and remain on until the vehicle is started. If the
bulb does not come on during starting, have the condi-
tion investigated promptly.
If this light comes on and remains on while driving, it
suggests a potential engine control problem and the need
for system service.
Although your vehicle will usually be drivable and not
need towing, see your dealer for service as soon as
possible.176 UNDERSTANDING YOUR INSTRUMENT PANEL

CAUTION!Prolonged driving with the MIL on could cause
damage to the engine control system. It also could
affect fuel economy and driveability.
If the MIL is flashing, severe catalytic converter
damage and power loss will soon occur. Immediate
service is required.
18. Brake System Warning Light
This light illuminates when the ignition key is turned to
the ON position and remains on for a few seconds. If the
light stays on longer, it may be an indication that the
parking brake has not been released. This light will
illuminate if the brake fluid is low, especially when
braking or accelerating hard. This light will illuminate if
the ABS indicator light has a malfunction. This light will
flash if the engine is running and the parking brake is on. If the light remains on when the parking brake is
released, it indicates a possible brake hydraulic system
malfunction. In this case, the light will remain on until
the cause is corrected.
If brake failure is indicated, immediate repair is necessary
and continued operation of the vehicle in this condition is
dangerous.
Acceleration which causes the rear wheels to slip for a
period of time may result in the red brake light illumi-
nating and a brake switch code being set on ABS
equipped vehicles. Depressing the brake pedal should
extinguish the red brake light.
19. ABS Warning Light
This light monitors the Anti-Lock Brake System
which is described elsewhere in this manual. This
light will come on when the ignition key is turned to the
ON position and may stay on for five seconds. If the ABS
light remains on or comes on during driving, it indicates UNDERSTANDING YOUR INSTRUMENT PANEL 177
4

that the anti-lock portion of the brake system is not
functioning and that service is required. See your autho-
rized dealer immediately. The ABS light could also
illuminate during loss of traction and remain illuminated
until the brake pedal is pressed.
20. Electronic Throttle Control (ETC)
This light informs you of a problem with the
Electronic Throttle Control system. If a prob-
lem is detected the light will come on while the
engine is running. If the light remains lit with
the engine running your vehicle will usually be drivable,
however, see your dealer for service as soon as possible.
If the light is flashing when the engine is running,
immediate service is required and you may experience
reduced performance, an elevated/rough idle or engine
stall and your vehicle may require towing. The light will
come on when the ignition is first turned on and remain on for 15 seconds as a bulb check. If the light does not
come on during starting, have the system checked by an
authorized dealer.
21. SERV 4WD Indicator
The 4WD indicator will be illuminated whenever the
4WD mode is engaged for either the manual or electric
shift 4WD systems. The SERV 4WD indicator monitors
the electric shift 4WD system. If the SERV 4WD light
stays on or comes on during driving, it means that the
4WD system is not functioning properly and that service
is required.
22. Front Fog Light Indicator — If Equipped
This light shows when the front fog lights are ON.178 UNDERSTANDING YOUR INSTRUMENT PANEL

3. To switch the clock to the small clock, quickly press
TIME again.
4. To toggle back to the large clock, simply press TIME. VIDEO ENTERTAINMENT SYSTEM (SALES CODE
XRV) — IF EQUIPPED
The optional VES™ (Video Entertainment System) con-
sists of a DVD player and LCD (liquid crystal display)
screen, a battery-powered remote control, and two head-
sets. The system is located in the headliner behind the
front row seat. Refer to your VES™ User’s Manual for
detailed operating instructions.
SATELLITE RADIO — IF EQUIPPED
Satellite radio uses direct satellite to receiver broadcast-
ing technology to provide clear digital sound, coast to
coast. The subscription service provider is Sirius™ Satel-
lite Radio. This service offers over 100 channels of music,
sports, news, entertainment, and programming for chil-
dren, directly from its satellites and broadcasting studios.222 UNDERSTANDING YOUR INSTRUMENT PANEL

System Activation
Sirius Satellite Radio service is pre-activated, and you
may begin listening immediately to the one year of
SIRIUS audio service that is included with the factory-
installed satellite radio system in your vehicle. Sirius will
contact you to supply a welcome kit and to confirm
subscription information, including the set up of your
on-line listening account at no additional charge. For
further information, call the toll-free number 888-539-
7474, or visit the Sirius web site at www.sirius.com.
Please have the following information available when
calling:
1. The Electronic Serial Number/Sirius Identification
Number (ESN/SID).
2. Your Vehicle Identification Number. Electronic Serial Number/Sirius Identification
Number (ESN/SID)
The Electronic Serial Number/Sirius Identification Num-
ber is needed to activate your Sirius Satellite Radio
system. To access the ESN/SID, refer to the following
steps:
ESN/SID Access with REF Radios
With the ignition switch in the ACCESSORY position and
the radio OFF, press the CD Eject and Time buttons
simultaneously for 3 seconds. The first four digits of the
twelve-digit ESN/SID number will display. Press the
SEEK UP button to display the next four digits. Continue
to press the SEEK UP button until all twelve ESN/SID
digits display. The SEEK DOWN will page down until
the first four digits display. The radio will exit the
ESN/SID mode when any other button is pushed, the
ignition is turned OFF, or 5 minutes has passed since any
button was pushed. UNDERSTANDING YOUR INSTRUMENT PANEL 223
4

NOTE: If you experience difficulty in playing a particu-
lar disc, it may be damaged, oversized, or have theft
protection encoding. Try a known good disc before
considering disc player service.
RADIO OPERATION AND CELLULAR PHONES
Under certain conditions, the operation of a cellular
phone in your vehicle can cause erratic or noisy perfor-
mance from your radio. This condition may be lessened
or eliminated by relocating the cellular phone antenna.
This condition is not harmful to the radio. If your radio
performance does not satisfactorily “clear” by the repo-
sitioning of the antenna, it is recommended that the radio
volume be turned down or off during cellular phone
operation. CLIMATE CONTROLS
The controls for the heating and ventilation system in this
vehicle consist of a series of rotary knobs. These comfort
controls can be set to obtain desired interior conditions.
Climate Control Location230 UNDERSTANDING YOUR INSTRUMENT PANEL

Engine Speed Control
CAUTION!Prevent overspeeding the engine going down hill.
When descending steep grades, use a combination of
gears and service brakes to control vehicle/engine
speed. Overspeed can cause severe engine damage.
Operating Precautions
Avoid Overheating The Engine
The temperature of the coolant (a mixture of 50%
ethylene-glycol and 50% water) must not exceed the
normal range of the temperature gauge (240°F/116°C)
with a 16 psi (110 kPa) radiator cap.
Usually the coolant temperature indicated during opera-
tion will be to the left of center in the normal range of the
gauge. Avoid Low Coolant Temperature Operation
Continual operation at low coolant temperature below
the normal range on the gauge (140°F/60°C) can be
harmful to the engine. Low coolant temperature can
cause incomplete combustion which allows carbon and
varnish to form on piston rings and injector nozzles.
Also, the unburned fuel can enter the crankcase, diluting
the lubricating oil and causing rapid wear to the engine.
Cooling System Tips — Automatic Transmission
To reduce potential for engine and transmission over-
heating in high ambient temperature conditions, take the
following actions:
• City Driving —
when stopped, put transmission in neutral and increase
engine idle speed.
• Highway Driving —
reduce your speed. STARTING AND OPERATING 263
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