2007 DODGE RAM 2500 DIESEL heater

attempting to start the engine. This can be accomplished
by turning the ignition OFF for at least 5 seconds and
then back ON after the WAIT TO START light has gone
off, but before the engine is started. However, repeated
cycling of the manifold heaters will result in damage to
the heater elements or reduced battery voltage.
NOTE: If multiple pre-heat cycles are used before
starting, additional engine run time may be required to
maintain battery state of charge at a satisfactory level.
•If the engine stalls after the initial start, the ignition
must be turned to the OFF position for at least 5
seconds and then to the ON position to recycle the
manifold heaters.
NOTE: Excessive white smoke and poor engine perfor-
mance will result if manifold heaters are not recycled.
•Heat generated by the manifold heaters dissipates
rapidly in a cold engine. If more than two minutes pass between the time the WAIT TO START light goes
OFF and the engine is started, recycle the manifold
heaters by turning the ignition OFF for at least 5
seconds and then back ON.
•If the vehicle is driven and vehicle speed exceeds 19
mph (31 km) before the manifold heater post-heat
(after start) cycle is complete, the manifold heaters will
shut off.
•If the engine is started before the WAIT TO START
light turns off, the preheat cycle will turn off.
•If the engine is cranked for more than 10 seconds, the
post-heat cycle will turn off.
NOTE: Engine idle speed will automatically increase to
1000 rpm at low coolant temperatures to improve engine
warm-up.
STARTING AND OPERATING 257
5

•Voltmeter Operation:
•The voltmeter may show a gauge fluctuation if
certain engine temperatures are below 66°F (19°C).
This cycling operation is caused by the post-heat
cycle of the intake manifold heater system. The
number of cycles and the length of the cycling
operation is controlled by the engine control mod-
ule, this time will not exceed 150 seconds. The
needle should then stabilize at the approximate
operation point.
•The cycling action will cause temporary dimming of
the headlamps, interior lamps, and also a noticeable
reduction in blower motor speed.
Cold Weather Precautions
Operation in ambient temperature below 32°F (0°C) may
require special considerations. The following charts sug-
gest these options:
Fuel Operating Range
* No. 1 diesel fuel should only be used where extended
arctic conditions (-10°F/-23°C) exist.
260 STARTING AND OPERATING

NOTE:
•Use of Climatized Diesel Fuel or Number 1 Diesel Fuel
results in a noticeable decrease in fuel economy.
•Climatized Diesel Fuel is a blend of Number 2 and
Number 1 Diesel Fuels which reduces the temperature
at which wax crystals form in fuel.
NOTE: Refer to Fuel Requirements in this section for
further details on fuel recommendations.
Engine Block Heater
The engine block heater warms engine coolant and
permits quicker starts in cold weather. Connect the heater
cord to a ground–fault interrupter protected 110–115 volt
AC electrical outlet with a grounded, three-wire exten-
sion cord.
The engine block heater cord is routed under the hood to
the right side and can be located just behind the grille
near the headlamp. NOTE:
The engine block heater cord is a factory in-
stalled option. If your vehicle is not equipped, heater
cords are available from your authorized Mopar dealer.
The block heater must be plugged in at least one hour to
have an adequate warming effect on the coolant.
WARNING!
Remember to disconnect the cord before driving.
Damage to the 110–115 volt electrical cord could
cause electrocution.
NOTE: The block heater will require 110 Volts AC and
6.5 Amps to activate the heater element.
STARTING AND OPERATING 261
5

Block Heater Usage
A.Temperatures below 0°F (-18°C)
•Block Heater Required for 15W-40
•Block Heater Recommended for 5W-40
B. Temperatures below - 20°F (-29°C)
•Block Heater Required for 5W-40
Winter Front Usage
If a winter front or cold weather cover is to be used, a
percentage of the total grille opening area must be left
uncovered to provide sufficient air flow to the charge air
cooler and automatic transmission oil cooler. The per-
centage of opening must be increased with the increasing
ambient air temperature and/or engine load. If the
cooling fan can be heard cycling frequently, increase the
size of the opening in the winter front. A suitable cold
weather cover is available from your Mopar dealer.
Battery Blanket Usage
A battery loses 60% of its cranking power as the battery
temperature decreases to 0°F (-18°). For the same de-
crease in temperature, the engine requires twice as much
power to crank at the same RPM. The use of 120 VAC
powered battery blankets will greatly increase starting
capability at low temperatures. Suitable battery blankets
are available from your authorized Mopar dealer.
Arctic Operation
Where there are no provisions to keep the engine warm
when it is operating in ambient temperatures consistently
below (-10°F/-23°C), use 5W-40 syntheticengine oil and
fuel that meets the requirements in Section 7, “Mainte-
nance Procedures,” Engine Oil Selection.
262 STARTING AND OPERATING

JUMP-STARTING
WARNING!
To prevent personal injury or damage to clothing, do
not allow battery fluid to contact eyes, skin or
fabrics. Do not lean over a battery when connecting
jumper cables or allow cable clamps to touch each
other. Keep open flames or sparks away from battery
vent holes. Always wear eye protection when work-
ing with batteries.
Do not use a booster battery or any other booster
source that has a greater than 12 volt system, i.e. do
not use a 24 volt power source.
NOTE: Replacement batteries should both be of equal
size to prevent damage to the vehicles charging system.
Your vehicle is equipped with two 12–volt batteries. If it
becomes necessary to use a booster battery, with jumper
cables, to start a vehicle’s engine because its batteries are
discharged, the following procedure should be followed:
Set the parking brake and place an automatic transmis-
sion in PARK (or NEUTRAL for a manual transmission).
Turn off lights, heater and other electrical loads. Observe
charge indicator (if equipped) in both batteries. If indica-
tor (if equipped) is light or yellow on either battery,
replace that battery.
WHAT TO DO IN EMERGENCIES 367
6

Tow Hooks.......................... 371
Towing ............................. 372
Emission Control System Maintenance ......... 450
Engine ............................... 378
Air Cleaner .......................... 389
Block Heater ....................... 254,261
Break-In Recommendations ................ 71
Compartment ......................... 378
Coolant (Antifreeze) .................... 446
Cooling ............................. 401
Data Plate ........................... 380
Identification ......................... 378
Idling .............................. 263
Jump Starting ......................... 367
Oil .............................. 383,446
Oil Synthetic ......................... 262
Runaway ............................ 317
Temperature Gauge ..................... 181
Event Data Recorder ...................... 56 Exhaust Gas Caution
................73,172,401
Exhaust System ................. 73,400,401,418
Exterior Lighting ........................ 124
Fan .................................. 407
Filters Engine Oil ..................... 383,386,446
Flashers Turn Signal .......................... 127
Flat Tire Stowage ..................... 356,366
Fluid, Brake ........................... 447
Fluid Capacities ......................... 445
Fluid Level Checks Brake ............................... 409
Manual Transmission ................... 412
Power Steering ........................ 397
Transfer Case ......................... 412
Fluids, Lubricants and Genuine Parts .......... 446
Fog Lights ....................... 126,185,436
482 INDEX

Passing............................. 128
Switch .............................. 124
Heated Mirrors ....................... 85,164
Heated Seats ........................... 119
Heater ............................... 237
High Beam/Low Beam Select (Dimmer) Switch . . 128
Hitches Trailer Towing ........................ 331
Hoisting .............................. 366
HomeLink (Garage Door Opener) Transmitter . . . 143
Hood Release .......................... 121
Hoses ............................. 408,411
Hub Caps ............................. 362
Hydraulic Clutch Fluid .................... 411
Ignition ............................... 12
Key ................................. 12
Ignition Key Removal ..................... 12
Illuminated Entry ........................ 19 Infant Restraint
........................ 57,58
Inflation Pressure Tires .................... 313
Inside Rearview Mirror .................... 82
Instrument Cluster .................... 178,179
Instrument Panel and Controls .............. 177
Instrument Panel Lens Cleaning ............. 425
Integrated Power Module (Fuses) ............ 426
Interior Appearance Care .................. 424
Interior Lights .......................... 123
Intermittent Wipers (Delay Wipers) ........... 129
Introduction ............................. 4
Jack Location ........................... 355
Jack Operation .......................... 357
Jump Starting .......................... 367
Key, Replacement ........................ 16
Key, Sentry (Immobilizer) ................... 15
Keyless Entry System ...................... 20
484 INDEX

Reclining............................ 111
Reclining Rear ........................ 114
Security Alarm (Theft Alarm) .............18,182
Selection of Coolant (Antifreeze) ..........403,446
Sentry Key (Immobilizer) ................... 15
Service Assistance ....................... 470
Service Contract ......................... 472
Service Information ...................... 380
Service Manuals ........................ 474
Setting the Clock .............188,192,200,213,226
Shifting ............................... 267
Automatic Transmission ................. 267
Manual Transmission ................... 274
Transfer Case ......................... 279
Transfer Case, Shifting into Transfer Case Neutral (N) .................. 345,348
Transfer Case, Shifting out of Transfer Case Neutral (N) .................. 347,350
Shoulder Belt Upper Anchorage .............. 40 Shoulder Belts
........................... 32
Side Airbag ............................. 54
Signals, Turn ........................... 127
Sliding Rear Window Power ............................ 30,165
Slippery Surfaces, Driving On ............... 288
Snow Chains (Tire Chains) ................. 313
Snow Plow ............................ 341
Snow Tires ............................ 315
Spare Tire .......................... 308,309
Speed Control (Cruise Control) .............. 133
Speedometer ........................... 180
Starting ............................... 253
Automatic Transmission ................. 253
Engine Block Heater ................. 254,261
Manual Transmission ................... 253
Starting Procedures ...................... 253
Starting Procedures (Diesel Engines) .......... 253
490 INDEX