air conditioning RAM CHASSIS CAB 2007 User Guide

WARNING!• Use only refrigerants and compressor lubricants
approved by the manufacturer for your air condi-
tioning system. Some unapproved refrigerants are
flammable and can explode, injuring you. Other
unapproved refrigerants or lubricants can cause
the system to fail, requiring costly repairs. Refer
to Section 3 of the Warranty Information book for
further warranty information.
• The air conditioning system contains refrigerant
under high pressure. To avoid risk of personal
injury or damage to the system, adding refrigerant
or any repair requiring lines to be disconnected
should be done by an experienced repairman. Refrigerant Recovery and Recycling
R-134a Air Conditioning Refrigerant is a hydrofluorocar-
bon (HFC) that is endorsed by the Environmental Pro-
tection Agency and is an ozone-saving product. How-
ever, the manufacturer recommends that air conditioning
service be performed by dealers or other service facilities
using recovery and recycling equipment.
Power Steering — Fluid Check
Checking the power steering fluid level at a defined
service interval is not required. The fluid should only be
checked if a leak is suspected, abnormal noises are
apparent, and/or the system is not functioning as antici-
pated. Coordinate inspection efforts through a certified
DaimlerChrysler Dealership.  MAINTAINING YOUR VEHICLE 421
7

• Make sure that the radiator and coolant recovery
bottle overflow hoses are not kinked or obstructed.
• Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
• Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory coolant performance, poor gas
mileage, and increased emissions.
Fan
Inspection
Check the fan for cracks and bent or broken blades. If any
of these conditions exist, you must replace the fan. Make
sure it is securely mounted. NOTE: This service procedure must be performed by a
trained service technician. Make arrangements with your
authorized Dodge Truck Dealer for this inspection.
Charge Air Cooler — Inter-Cooler (Diesel
Engines)
The charge air cooler is positioned between the radiator
and the air conditioner condenser. Air enters the engine
through the air cleaner and passes through the turbo-
charger where it is pressurized. This pressurized air
rapidly reaches high temperature. The air is then directed
through a hose to the charge air cooler and through
another hose to the intake manifold of the engine. The air
entering the engine has been cooled by about 50 to 100
degrees Fahrenheit. This cooling process enables more
efficient burning of fuel resulting in fewer emissions.
To guarantee optimum performance of the system, keep
the surfaces of the charge air cooler, condenser and
radiator clean and free of debris. Periodically check the432 MAINTAINING YOUR VEHICLE

VEHICLE STORAGE
If you are storing your vehicle for more than 21 days, we
recommend that you take the following steps to mini-
mize the drain on your vehicle’s battery:
• Disconnect the Ignition-Off Draw fuse (I.O.D.) fuse
located in the Integrated Power Module, located in the
engine compartment. The I.O.D. cavity includes a
snap-in retainer that allows the fuse to be discon-
nected, without removing it from the fuse block.
• The electronic shift transfer case should be placed in
the 4HI mode and kept in this position to minimize the
battery drain.
• As an alternative to the above steps you may, discon-
nect the negative cables from both batteries.
• Anytime you store your vehicle, or keep it out of
service (i.e. vacation) for two weeks or more, run the
air conditioning system at idle for about five minutes in the fresh air and high blower setting. This will
insure adequate system lubrication to minimize the
possibility of compressor damage when the system is
started again.
NOTE: When reinstalling the IOD fuse push firmly until
fully seated, the gages in the Instrument Cluster will do
a full sweep, when the ignition key is cycled to RUN. This
is a normal condition.
REPLACEMENT LIGHT BULBS
LIGHT BULBS — Inside Bulb No.
Overhead Console Lights ............... TS 212-2
Dome Light ............................ 7679
NOTE: For lighted switches, see your dealer for replace-
ment instructions.
All of the inside bulbs are brass or glass wedge base.
Aluminum base bulbs are not approved. MAINTAINING YOUR VEHICLE 461
7

Adding Fuel ........................ 333,335
Adjustable Pedals ....................... 130
Air Cleaner, Engine (Engine Air Cleaner
Filter) .......................... 406,407,446
Air Conditioner Maintenance ............... 420
Air Conditioning Refrigerant ............. 420,421
Air Conditioning System ................ 233,420
Air Conditioning System, Zone Control ........ 236
AirFilter .............................. 407
Air Pressure, Tires .................... 315,323
Airbag .............................. 48,53
Airbag Light ......................... 76,173
Airbag On/Off Switch ..................... 53
Alarm, Panic ............................ 22
Alarm (Security Alarm) ................. 18,175
Alarm System (Security Alarm) ............... 18
Alignment and Balance ................... 322
Alterations/Modifications, Vehicle ............. 8
Antenna, Satellite Radio ................... 226 Antifreeze (Engine Coolant) .............. 428,429
Capacities ........................... 468
Anti-Lock Warning Light ............... 177,304
Anti-Theft Security Alarm (Theft Alarm) ........ 18
Anti-Theft System ..................... 18,175
Appearance Care ........................ 452
Ashtray ............................... 151
Auto Unlock, Doors ...................... 145
AutomaticDimmingMirror ................. 84
Automatic Door Locks .................... 145
Automatic Transaxle ...................... 12
Interlock System ........................ 15
Automatic Transmission ........... 267,273,438,441
Fluid and Filter Changes .............. 440,443
Fluid Level Check ................ 439,441,442
FluidType ..................... 438,441,471
Shift Indicator ........................ 175
Special Additives ................... 441,444
Automatic Transmission (Diesel Engine Only) .... 438514 INDEX