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Dodge Dakota (ND). Manual - part 319

For those lamps on the courtesy lamp circuit with independent switching such as the standard or optional map/
reading lamps and the glove box lamp the EMIC provides a battery voltage output to the switches through a sep-
arate circuit. The EMIC provides a battery saver (load shedding) feature for all courtesy lamps, which will
automatically turn these lamps off if they are left on for more than about eight minutes with the ignition switch in the
Off position.

PANEL LAMPS DIMMER CIRCUIT

The panel lamps dimmer circuit actually includes several circuits. These circuits control the illumination and dimming
level of the headlamp switch, the heater-air conditioner controls, the four-wheel drive selector switch and the center
bezel lamp. All lamps in the panel lamps dimmer circuits are provided a path to ground at all times through a hard
wired ground circuit. These lamps illuminate based upon inputs to the EMIC from the rotary control knob and ver-
tical thumbwheel of the headlamp switch. The control knob on the headlamp switch selects the exterior lights, while
the thumbwheel selects the panel lamps intensity (dimming) level.

When the exterior lighting is turned On, the EMIC provides electronic dimming level messages to the radio and the
Compass Mini-Trip Computer (CMTC) over the CAN data bus. The EMIC also supplies a 12-volt Pulse Width Mod-
ulated (PWM) output to all of the incandescent lamps in the panel lamps dimmer circuits over the several panel
lamps dimmer circuits. This shared PWM output synchronizes the selected illumination intensity level of all of the
lamps in the panel lamps dimmer circuit.

The radio and the CMTC each use the dimming level messages to control the illumination intensity of both their
Vacuum Fluorescent Display (VFD) units and their control lighting. In addition, when the thumbwheel of the head-
lamp switch is moved to the Parade/Funeral Mode detent position, all of the VFD units are illuminated at their full
intensity levels for increased visibility when the vehicle is driven during daylight hours with the exterior lights turned
On.

WARNING

WARNINGS - LAMPS/LIGHTING - INTERIOR

WARNING:: To avoid personal injury or death, eye protection should be used when servicing any glass
components.

CAUTION: Do not use bulbs with higher candle power than indicated in the Bulb Application table (Refer to
8 - ELECTRICAL/LAMPS/LIGHTING - INTERIOR - SPECIFICATIONS). In addition, do not use fuses, circuit
breakers or relays having greater amperage value than indicated on the fuse panel or in the Owner’s Man-
ual. Damage to lamps, lenses, wiring and other related electrical components can result.

DIAGNOSIS AND TESTING

LAMPS/LIGHTING - INTERIOR

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, occupant classification sys-
tem, 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 diagnosis 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.

NOTE: When diagnosing the interior lighting circuits, remember that high generator output can burn out
bulbs rapidly and repeatedly; and, that dim or flickering bulbs can be caused by low generator output or
poor battery condition. If one of these symptoms is a problem on the vehicle, be certain to diagnose the
battery and charging system, then repair as necessary.

NOTE: A good ground is necessary for proper lighting operation. If a lighting problem is being diagnosed
that involves multiple symptoms, systems, or components, the problem can often be traced to a loose, cor-
roded, or open ground.

8L - 138

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

The hard wired interior lamp and lighting circuits may be diagnosed and tested using conventional diagnostic tools
and methods. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper
wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information
and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods may not prove conclusive in the diagnosis of the ElectroMechanical
Instrument Cluster (EMIC), the Controller Area Network (CAN) data bus, or the electronic message inputs used to
provide interior lamp and lighting service or many of the electronic features of the interior lamp and lighting systems.
The most reliable, efficient, and accurate means to diagnose the EMIC, the CAN data bus, and the electronic mes-
sage inputs for the interior lamps and lighting system requires the use of a diagnostic scan tool. Refer to the appro-
priate diagnostic information.

COURTESY LAMP CIRCUIT

CONDITION

POSSIBLE CAUSES

CORRECTION

A SINGLE LAMP IN THE

COURTESY LAMP CIRCUIT

DOES NOT ILLUMINATE

1. Faulty or missing bulb.

1. Test and replace the courtesy lamp bulb
as required.

2. Faulty lamp switch.

2. Test and replace a faulty dome lamp
switch, dome/reading lamp switch, cargo
lamp switch, or glove box lamp switch as
required.

3. Faulty ground circuit.

3. Test and repair the open ground circuit
as required.

4. Faulty feed circuit.

4. Test and repair the open feed circuit as
required.

ALL LAMPS IN THE

COURTESY LAMP CIRCUIT

DO NOT ILLUMINATE

1. Faulty or missing fuse.

1. Test and replace the fuse as required.

2. Faulty ground circuit.

2. Test and repair the open ground circuit
as required.

3. Courtesy defeat feature
turned On.

3. Turn courtesy defeat feature Off.

4. Faulty courtesy lamp control
circuit.

4. Test and repair the courtesy lamp control
circuit as required.

5. Faulty headlamp switch.

5. Test and replace the headlamp switch as
required.

6. Faulty ElectroMechanical
Instrument Cluster (EMIC),
EMIC input, or EMIC output.

6. Use a diagnostic scan tool to test the
EMIC, its inputs, and its outputs. Refer to
the appropriate diagnostic information.

A SINGLE LAMP IN THE

COURTESY LAMP CIRCUIT

DOES NOT EXTINGUISH

1. Faulty lamp switch.

1. Test and replace a faulty dome lamp
switch, dome/reading lamp switch, cargo
lamp switch, or glove box lamp switch as
required.

ALL LAMPS IN THE

COURTESY LAMP CIRCUIT

DO NOT EXTINGUISH

1. Faulty ajar switch.

1. Test and replace a faulty door ajar switch
as required.

2. Faulty ajar switch sense
circuit.

2. Test and repair the shorted ajar switch
sense circuit as required.

3. Faulty ElectroMechanical
Instrument Cluster (EMIC),
EMIC input, or EMIC output.

3. Use a diagnostic scan tool to test the
EMIC, its inputs, and its outputs. Refer to
the appropriate diagnostic information.

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

8L - 139

PANEL LAMPS DIMMER CIRCUIT

NOTE: As part of the exterior lighting failsafe feature, upon ignition On all of the panel lamps dimmer circuit
lamps will illuminate at full intensity and the exterior park lamps and headlamp low beams will illuminate
regardless of the headlamp switch position if the instrument cluster cannot detect an input from the head-
lamp switch, or if there is a loss of data bus communication.

CONDITION

POSSIBLE CAUSES

CORRECTION

A SINGLE LAMP DOES NOT

ILLUMINATE

1. Faulty or missing bulb.

1. Test and replace lamp bulb as required.

2. Faulty ground circuit.

2. Test and repair lamp ground circuit as
required.

3. Faulty feed circuit.

3. Test and repair open feed circuit as
required.

A SINGLE LAMP DOES NOT

EXTINGUISH

1. Faulty feed circuit.

1. Test and repair shorted feed circuit as
required.

ALL LAMPS DO NOT

ILLUMINATE

1. Faulty headlamp switch.

1. Test and replace the headlamp switch as
required.

2. Faulty ElectroMechanical
Instrument Cluster (EMIC),
EMIC input, or EMIC output.

2. Use a diagnostic scan tool to test the
EMIC, its inputs, and its outputs. Refer to
the appropriate diagnostic information.

ALL LAMPS ILLUMINATE AT

FULL INTENSITY AT IGNITION

1. Loss of data bus
communication.

1. Use a diagnostic scan tool to test the
data bus. Refer to the appropriate
diagnostic information.

SPECIFICATIONS

LAMPS/LIGHTING - INTERIOR

COURTESY LAMPS

BULB APPLICATION TABLE

LAMP

BULB

CARGO LAMP

912

FRONT DOME/READING EXCEPT WITH OVERHEAD
CONSOLE

578

FRONT DOME/READING WITH OVERHEAD
CONSOLE

192

GLOVE BOX LAMP

194

REAR DOME LAMP (NON-SWITCHED OR
SWITCHED)

578

PANEL LAMPS

BULB APPLICATION TABLE

LAMP

BULB

CENTER BEZEL LAMP

COMPASS MINI-TRIP CONTROL

MOPAR 04437661

A/C-HEAT CONTROL

MOPAR 05135537AA

8L - 140

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

CARGO LAMP

REMOVAL

NOTE: The Center High Mounted Stop Lamp (CHMSL) houses three bulbs. The center bulb is the CHMSL
bulb and illuminates through a red lens, while the two outboard bulbs are for the cargo lamps and illumi-
nate through clear lenses. The bulb types and service procedures are identical for all three of these bulbs.

1. Disconnect and isolate the battery negative cable.

2. Remove the two screws that secure the CHMSL to

the rear cab roof header panel.

3. Pull the CHMSL lens and housing (1) away from

the header panel far enough to access the lamp
wiring and bulb sockets (4) on the back of the
lamp.

4. Firmly grasp the center socket on the back of the

lamp housing and rotate it counterclockwise about
30 degrees to unlock it.

5. Pull the socket and bulb straight out from the

keyed opening in the housing.

6. Pull the base of the bulb (2) straight out of the

socket.

INSTALLATION

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.

1. Align the base of the cargo lamp bulb (2) with the

socket (4).

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 CHMSL housing (1).

4. Insert the socket and bulb into the housing until the

socket is firmly seated.

5. Rotate the socket clockwise about 30 degrees to

lock it into place.

6. Position the CHMSL into the opening in the rear

cab roof header panel.

7. Install and tighten the two screws that secure the

CHMSL to the header panel. Tighten the screws to
2 N·m (20 in. lbs.).

8. Reconnect the battery negative cable.

LAMPS/LIGHTING - INTERIOR - SERVICE INFORMATION

8L - 141

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