2004 DODGE RAM 1500 GAS wiring

Airbag System Components
The airbag system consists of the following:
²Airbag Control Module
²AIRBAG Readiness Light
²Driver Airbag
²Passenger Airbag
²Steering Wheel and Column
²Instrument Panel
²Crash Sensor
²Interconnecting Wiring
²Knee Impact Bolsters
²Passenger Side Frontal Airbag ON/OFF Switch (Stan-
dard Cab Vehicles Only)The Window Airbag System, on vehicles equipped,
consists of the following:
²AIRBAG Readiness Light (shared with the front airbag
system)
²Window Bags Above the Side Windows.
²Airbag Control Module (shared with the front airbag
system)
²Side impact sensors
²Interconnecting Wiring
How The Airbag System Works
²
The airbag control module determines if a frontal
collision is severe enough to require the airbags to
inflate.
²The airbag control module will not detect roll over, or
rear collisions.
48 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

bags to inflate, it signals the inflators on the crash side of
the vehicle. A quantity of nontoxic gas is generated to
inflate the window bag. The inflating window bag
pushes the side pillar molding out of the way and covers
the window. The airbag inflates in about 30 milliseconds
(about one-quarter of the time it takes to blink your eyes)
with enough force to injure you if you are not belted and
seated properly, or if items are positioned in the area
where the window bag inflates. This especially applies to
children. The window bag is only about 3
1¤2inches (8.9
cm) thick when it is inflated.
Enhanced Accident Response System
If the airbags deploy after an impact and the electrical
system remains functional, vehicles equipped with
power door locks will unlock automatically. In addition,
approximately 10 seconds after the vehicle has stopped
moving, the interior lights will light until the ignition
switch is turned off.
Maintaining Your Airbag Systems
WARNING!
²Modifications to any part of the airbag system
could cause it to fail when you need it. You could
be injured because the airbags are not there to
protect you. Do not modify the components or
wiring, including adding any kind of badges or
stickers to the steering wheel hub trim cover or
the upper right side of the instrument panel. Do
not modify the front bumper, vehicle body struc-
ture, or frame.
²You need proper knee impact protection in a
collision. Do not mount or locate any aftermarket
equipment on or behind the knee bolster.
²It is dangerous to try to repair any part of the
airbag system yourself. Be sure to tell anyone who
works on your vehicle that it has airbags.
54 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Headlamp Delay Ð If Equipped
To aid in your exit, your vehicle, if equipped, can be
programmed by your dealer with a headlamp delay that
will leave the headlamps on for 0, 30, 60, or 90 seconds.
This delay is initiated when the ignition is turned OFF
while the headlamp switch is on, and then the headlamp
switch is cycled off. The headlamps will remain on for 60
seconds. Headlamp delay can be cancelled by either
turning the headlamp switch ON then OFF or by turning
the ignition ON.
Headlights, Parking Lights, Panel Lights
When the headlight switch is rotated to the first
position, the parking lights, taillights, side marker
lights, license plate light and instrument panel
lights are all turned on. Rotating the headlight switch to
the first position will also turn on the cab top clearance
lights, flare lights, and tailgate lights if the vehicle is
equipped with these lights. The headlights will turn ON
when the switch is rotated to the second position. The9LAMP OUT9indicator will be illuminated in the instru-
ment cluster if a defective bulb or wiring circuit is
detected for the headlamp system.
Your vehicle is equipped with plastic headlight lenses
that are lighter and less susceptible to stone breakage
than glass headlights.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 101
3

CARGO LIGHT
The cargo lights are turned on by rotating the dimmer
control to the optional fully upward position. The cargo
lights will also turn on for 30 seconds when a key fob
Unlock is pressed, as part of the illuminated entry
feature.
MULTIFUNCTION CONTROL LEVER
The multifunction control lever is located on the left side
of the steering column.
Turn Signals
Move the lever up or down to signal a right-hand or
left-hand turn.
The arrow on either side of the instrument cluster flashes
to indicate the direction of the turn, and proper operation
of the front and rear turn signal lights. If a defective bulb
or wiring circuit is detected for the turn signal system, the
arrow indicators will flash at a faster rate. Also, the
9LAMP OUT9indicator in the instrument cluster will beilluminated and a chime will be heard. If an indicator
fails to light when the lever is moved, it would suggest
that the switch or indicator lamp is defective.
You can signal a lane change by moving the lever
partially up or down.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 103
3

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.
NOTE:There is also an engine hour function. This
indicates the 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.21. TOW/HAUL (Automatic Transmissions Only)
The TOW/HAUL button is located at the end of the gear
shift lever. This light will illuminate when the TOW/
HAUL button has been selected.
22. LAMP OUT Light
The LAMP OUT indicator in the instrument cluster alerts
the driver if a defective bulb or wiring circuit is detected
for most of the exterior lamps - headlamps, turn signal
lamps, and stop lamps.
23. 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.
UNDERSTANDING YOUR INSTRUMENT PANEL 149
4

2500/3500 Models
²
The Axles on 2500/3500 Modelsare trailer tow ready
andDO NOT REQUIREany special axle lubes or
additives.
Trailer Towing Recommendations
²
All trailer hitches should be professionally installed on
your vehicle.
²Safety chains must always be used between your
vehicle and trailer.
²Donotinterconnect the hydraulic brake system or
vacuum system of your vehicle with that of the trailer.
This could cause inadequate braking and possible
personal injury. An electrically±actuated electric trailer
brake controller is recommended.
²Trailer brakes are recommended for trailers over 1000
lbs (454 kg) and are required for trailers in excess of
2,000 lbs (907 kg)
²Use an approved wiring harness connector on the
trailer. Standard equipment on all RAM pickup mod-
els provides a 4-way trailer tow connector located
under the bumper. This connector contains the follow-
ing vehicle circuits: park/tail lamps, left stop/turn
lamp, right stop/turn lamp, and ground. With the
optional Trailer Tow Prep package a 7-way connector
is provided with the following additional circuits:
backup lamp, trailer battery and electric brake.
NOTE:Connect trailer lighting and brakes using factory
harnesses only. Do not cut or splice wiring to the brake
circuits.
STARTING AND OPERATING 273
5

CAUTION!
Connect trailer lighting and brakes using factory
harnesses only. Do not cut or splice wiring to the
brake circuits. Use an approved wiring harness con-
nector on the trailer.
Trailer Weight and Trailer Tongue Weight
Gross Trailer Weight (GTW) means the weight of the
trailer plus the weight of all cargo, consumables and
equipment loaded on the trailer when in actual under-
way towing condition. The recommended way to mea-
sure GTW is to put your fully loaded trailer on a vehicle
scale. The entire weight of the trailer must be supported
by the scale.
Tongue Weight is the weight placed on the vehicle's
trailer hitch by the trailer. Always load a trailer with 60%to 65% of the weight in the front of the trailer. This places
10% to 15% of the GTW on the tow hitch of your vehicle.
Trailer sway control and equalizing hitch are required for
Class III or IV trailer hitches and tongue weights above
350 lbs (159 kg).
Tongue weight must be equal to at least 10% of GTW, but
no more than 15% of GTW.
276 STARTING AND OPERATING