Dodge Nitro. Manual - part 646

 

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Dodge Nitro. Manual - part 646

 

 

Fig. 26: Identifying Front End Module, Wire Harness Connectors, Front Lamp Unit Housing, Front End 
Module Grille & Headlamp Leveling Motor
 
Courtesy of CHRYSLER LLC 

1. Position the headlamp bulb through the opening in the back of the front lamp unit housing (6) into the 

keyed opening in the headlamp reflector.  

2. Be certain the bulb is fully seated in the reflector, then pivot the wire bulb retainer back over the bulb 

flange.  

3. Pinch the two ends of the wire bulb retainer together and engage them under the hooks to secure them to 

the bulb flange of the reflector.  

4. Position the center opening of the rubber boot seal over the base of the headlamp bulb and push it fully 

over the bulb base.  

5. Position the outer circumference of the boot seal over the flange on the back of the front lamp unit 

housing and pull it over the housing flange until the seal is fully engaged.  

6. Reconnect the front end module wire harness connector (5) to the headlamp bulb base on the back of the 

front lamp unit housing.  

7. Reconnect the battery negative cable.  

FRONT LAMP UNIT 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Service Information - Nitro

  

Fig. 27: Identifying Grille & Front Lamp Units 
Courtesy of CHRYSLER LLC 

1. Position the front lamp unit to the back of the front end module grille.  

2. Install and tighten the screws that secure the front lamp unit to the back of the grille. Tighten the screws 

to 3 N.m (23 in. lbs.).  

3. Reinstall the grille and both front lamp units to the face of the front end module as a unit. Refer to 

INSTALLATION .  

4. Reconnect the battery negative cable.  

5. Confirm proper headlamp alignment. See FRONT LAMP AIMING.  

HAZARD SWITCH 

DESCRIPTION 

HAZARD SWITCH 

Fig. 28: Identifying Occupant Classification System Switches & Indicators 
Courtesy of CHRYSLER LLC 

The hazard switch (3) is integral to the instrument panel switch pod (1), which is secured to the instrument 
panel center bezel just below the heater and air conditioner controls. A red, stencil-like International Control 
and Display Symbol icon for Hazard Warning identifies the hazard switch button. The remainder of the hazard 
switch circuitry is concealed within the instrument panel switch pod.

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Service Information - Nitro

  

The hazard switch button has panel lamps dimmer controlled illumination for night visibility. The switch button 
latches to a slightly lowered position when the hazard warning system is activated and the icon on the switch 
button will illuminate at an increased intensity while the turn signals and turn signal indicators are flashing. The 
switch button unlatches to a position flush with the other push buttons in the switch pod when the hazard 
warning is deactivated. 

All of the circuitry and components of the hazard switch are contained within a molded black plastic instrument 
panel switch pod housing. A single connector receptacle is integral to the back of the switch pod housing. The 
switch is connected to the vehicle electrical system through a dedicated take out and connector of the instrument 
panel wire harness. 

The hazard switch cannot be adjusted or repaired and, if ineffective or damaged, the entire instrument panel 
switch pod unit must be replaced. Refer to REMOVAL . 

OPERATION 

HAZARD SWITCH 

The status of the hazard switch is continually monitored by the circuitry within the instrument panel switch pod. 
The switch pod receives battery voltage at all times on a fused battery feed circuit, and a path to ground at all 
times through the instrument panel wire harness. The only other inputs to the switch pod consists of electronic 
communication with the Electro Mechanical Instrument Cluster (EMIC) (also known as the Cab Compartment 
Node/CCN) over the single wire Local Interface Network (LIN) data bus. 

Whenever the hazard switch is in its unlatched and raised position, the hazard warning system is selected and 
the switch pod circuitry sends a hard wired output to the Totally Integrated Power Module (TIPM) over the 
CAN data bus. When the TIPM receives a hazard switch input it then controls hazard warning system operation 
and flash rate by controlling battery voltage outputs through high side drivers on the right and left turn signal 
feed circuits. The TIPM also sends the appropriate electronic messages back to the EMIC to control the 
illumination and flash rate of the right and left turn signal indicators, as well as to control the click rate of an 
electromechanical relay soldered onto the EMIC electronic circuit board that emulates the sound emitted by a 
conventional hazard warning flasher. The EMIC then sends messages back to the switch pod to control the 
illumination of the hazard switch push button. 

The hard wired circuits for the instrument panel switch pod may be diagnosed using conventional diagnostic 
tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods 
will not prove conclusive in the diagnosis of the hazard warning switch or the electronic controls and 
communication between other modules and devices that provide some features of the hazard warning system. 
The most reliable, efficient, and accurate means to diagnose the hazard switch or the electronic controls and 
communication related to hazard warning system operation requires the use of a diagnostic scan tool. Refer to 
the appropriate diagnostic information. 

HEADLAMP LEVELING MOTOR 

DESCRIPTION 

HEADLAMP LEVELING MOTOR 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Service Information - Nitro

  

Fig. 29: Identifying Front End Module, Wire Harness Connectors, Front Lamp Unit Housing, Front End 
Module Grille & Headlamp Leveling Motor
 
Courtesy of CHRYSLER LLC 

The headlamp leveling motor (2) is located on the rear inboard side of each front lamp unit housing (6) on 
vehicles equipped with the headlamp leveling system, which is available only in certain markets where it is 
required equipment. The motor is encased within a molded plastic housing and is secured by an integral wedge-
type mounting boss to a keyed flange on the back of the front lamp unit housing. A rubber seal around the 
circumference of the mounting boss seals the motor to the lamp housing. 

The outside of the motor housing features an integral molded connector on its rearward surface and a plastic 
pushrod with a ball formation on its free end extends from the motor mounting boss. Within the motor housing 
is a 12-volt Direct Current (DC) servo motor, an electronic controller board that includes the motor logic 
circuits, and an integral screw-drive transmission. The headlamp leveling motor is connected to the vehicle 
electrical system through a dedicated take out and connector of the front end module wire harness. 

The headlamp leveling motor is serviced as a unit with the front lamp unit. The motor cannot be repaired and, if 
ineffective or damaged, the entire front lamp unit must be replaced. 

OPERATION 

HEADLAMP LEVELING MOTOR 

The controller board and logic circuitry of the headlamp leveling motor controls motor operation based upon a 
voltage signal input received from the Totally Integrated Power Module (TIPM). The TIPM uses electronic 
messages received over the Controller Area Network (CAN) data bus from the Electro Mechanical Instrument 
Cluster (EMIC) (also known as the Cab Compartment Node/CCN) to determine the correct voltage signal to 
provide the leveling motor, while the EMIC uses electronic messages received over the Local Interface Network 
(LIN) data bus from the instrument panel switch pod to monitor the headlamp leveling switch selection. 

The headlamp leveling motors have a path to ground at all times. The motors operate on battery voltage 
received through the headlamp low beam feed circuits so that the system will only operate when the headlamp 
low beams are turned ON. When the motor is energized it will extend or retract the motor pushrod through an 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Lamps/Lighting - Exterior - Service Information - Nitro

  

 

 

 

 

 

 

 

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