Dodge Ram Truck 1500-2500-3500. Manual - part 453

BULB - WITH SUNROOF

NOTE: On vehicles equipped with an optional overhead console the standard front dome lamp is replaced
by two combination dome and reading lamps that are integral to the console housing. Each of these lamps
is controlled by the door ajar switches on the courtesy lamp circuit, but also are independently controlled
by a switch that is activated by depressing the lamp lens. The bulb types and service procedures are iden-
tical for both of these lamps.

1. Disconnect and isolate the battery negative cable.

2. Remove the overhead console (3) from the head-

liner. (Refer to 8 - ELECTRICAL/OVERHEAD
CONSOLE - REMOVAL).

3. Firmly grasp the back of the reading lamp bulb

socket (1) and unsnap it from the overhead con-
sole lamp housing.

4. Pull the socket and bulb (2) straight out from the

keyed opening in the lamp housing.

5. Pull the base of the bulb straight out of the socket.

INSTALLATION

BULB - WITHOUT SUNROOF

CAUTION: Always use the correct bulb size and type for replacement. An incorrect bulb size or type may
overheat and cause damage to the lamp, the socket and/or the lamp wiring.

8L - 218

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

DR/DH

1. Align the ends of the bulb (2) with the two bulb

holders (1) within the overhead console lamp hous-
ing.

2. Carefully press the bulb firmly and evenly into the

bulb holders until it snaps into place.

3. Position the lens tab (2) into the slot in the rear of

the overhead console (1) lamp housing.

4. Align the pivot tabs (3) on each side of the lens

with the pivots within the overhead console lamp
housing.

5. Press firmly and evenly on the lens over both pivot

locations until both pivot tabs snap back onto the
pivots within the housing.

6. Reconnect the battery negative cable.

BULB - WITH SUNROOF

CAUTION: Always use the correct bulb size and type for replacement. An incorrect bulb size or type may
overheat and cause damage to the lamp, the socket and/or the lamp wiring.

DR/DH

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

8L - 219

1. Align the base of the overhead console reading

lamp bulb (2) with the socket (1).

2. Push the bulb straight into the socket until the base

is firmly seated.

3. Align the socket and bulb with the keyed opening

on the back of lamp housing in the overhead con-
sole.

4. Insert the socket and bulb into the housing and

press firmly on the back of the socket until it snaps
into place and is firmly seated.

5. Reinstall the overhead console onto the headliner.

(Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE
- INSTALLATION).

6. Reconnect the battery negative cable.

DOOR AJAR SWITCH

DESCRIPTION

This vehicle has up to four door ajar switches, one for each door. Each switch is concealed within and integral to its
respective door latch unit. The switches are momentary leaf contact-type units that are actuated by the mechanisms
internal to the door latch. A short pigtail wire and connector on each door latch connects the door ajar switch to the
vehicle electrical system through its respective door wire harness. The door ajar switches cannot be adjusted or
repaired and, if faulty or damaged, the door latch unit must be replaced. (Refer to 23 - BODY/DOOR - FRONT/
LATCH - REMOVAL) or (Refer to 23 - BODY/DOOR - REAR/LATCH - REMOVAL).

OPERATION

The door ajar switches are actuated by the mechanisms internal to the door latch. When a door is closed and
properly latched, its door ajar switch is an open circuit. When a door is open or only partially latched, the door ajar
switch is a closed circuit. The door ajar switches are hard wired in series between a body ground and the Electro-
Mechanical Instrument Cluster (EMIC). The EMIC reads the hard wired door ajar switch inputs through internal pull-
ups, then uses these inputs to control many electronic functions and features of the vehicle.

The EMIC also sends the proper switch status messages to other electronic modules over the Programmable Com-
munications Interface (PCI) data bus network. The door ajar switches can be diagnosed and tested using conven-
tional diagnostic tools and methods. Refer to the appropriate wiring information. However, conventional diagnostic
methods may not prove conclusive in the diagnosis of the EMIC, the PCI data bus, or the electronic messaging
used to convey door ajar switch status to other modules in the vehicle. The most reliable, efficient, and accurate
means to diagnose the EMIC, the PCI data bus, and both the hard wired and electronic message inputs and outputs
affected by the door ajar switch inputs requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic
information.

8L - 220

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

DR/DH

LAMP-GLOVE BOX

REMOVAL

BULB

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental
restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact
sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative
(ground) cable, then wait two minutes for the system capacitor to discharge before performing further diag-
nosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the
proper precautions could result in accidental airbag deployment.

1. Disconnect and isolate the battery negative cable.

2. Open the glove box door.

3. Reach through the window (3) in the instrument

panel glove box opening (1) to access the bulb on
the side of the glove box lamp and switch unit (2).

4. Pull the base of the bulb straight out of the bulb

holder.

LAMP/SWITCH

DR/DH

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

8L - 221

Content .. 451 452 453 454 ..