Interior Lighting

INTERIOR LIGHTING
The Instrument Cluster controls the Interior/Courtesy Lamps. The Instrument Cluster activates the courtesy lamps when either a Dome Lamp switch is turned ON or a door is opened.

The Instrument Cluster also monitors the output of the Glove Box and Map lamps. The Cargo lamps are controlled by the Instrument Cluster, it receives an output message from the Headlamp switch to turn ON the lamps.

The Instrument Cluster provides battery protection by shutting down the interior lamps when a door or courtesy/map lamp is left on or open.

DOME LAMP
The dome lamp is controlled by the instrument cluster which provides power at all times, regardless of the ignition switch position. The ground circuit for the lamp is switched through the integral dome lamp switch or through the door ajar switches via the instrument cluster.

The dome lamp lens and bulb are available for service replacement. If either of the lamp switch or bulb holders is faulty or damaged, the dome lamp assembly must be replaced.

For service of the dome lamp bulb, refer to the appropriate wiring information.

The dome lamp is activated by the door ajar switches via the instrument cluster. When all of the doors are closed, the lamp can be activated by depressing the lens. When any door is open, depressing the lamp lense to activate the lamp switch will not turn the lamps off.

The instrument cluster monitors the door ajar switches. When a door is open the instrument cluster grounds the low side drivers to turn ON the lamp. Upon closing all doors, the instrument cluster initiates a 30 second timer. If any of the doors are opened during the "time out" cycle, the instrument cluster will reset the timer until all doors are closed. The instrument cluster will faid to OFF when the doors are closed and the ignition is turned ON, the time out expires or the power locks are activated.

DOOR AJAR SWITCH
The door ajar switches are integral to the door latches on each door The switches close a path to ground for the Instrument Cluster when a door is opened.

The door ajar switches cannot be repaired and, if faulty or damaged, the door latch unit must be replaced. Refer to the Body section under Doors for the removal and installation procedure.

The door ajar switches close a path to ground for the Instrument Cluster when a door is opened. The passenger front door is connected in a parallel-series circuit between ground and the Instrument Cluster, while the driver side front door ajar switch is connected in series between ground and the Instrument Cluster to provide a unique input. The Instrument Cluster reads the switch status, then sends the proper switch status messages to other electronic modules over the Programmable Communications Interface (PCI) data bus network. The door ajar switches can be diagnosed using conventional diagnostic tools and methods. Refer to the Body section under Doors for the Removal and Installation procedures.

READING LAMP
The overhead console in this vehicle is equipped with two individual reading and courtesy lamps. The lamp lenses are the only visible components of these lamps. Each lamp has its own switch, bulb, reflector and lens within the overhead console.

The overhead console reading and courtesy lamps are controlled by the instrument cluster which provides power at all times, regardless of the ignition switch position. The ground circuit for the lamps is switched through the integral reading and courtesy lamp switches or through the door ajar switches. Each lamp is designed and aimed to provide illumination that will be directed only to that side of the vehicle on which the lamp is located.

The reading and courtesy lamp lenses and bulbs are available for service replacement. The reading and courtesy lamp switches, bulb holders and wiring are only available as part of the overhead console wire harness. If either of the lamp switches or bulb holders is faulty or damaged, the entire overhead console wire harness assembly must be replaced.

For service of the reading and courtesy lamp bulbs, refer to the appropriate wiring information.

All reading and courtesy lamps located in the overhead console are activated by the door ajar switches via the instrument cluster. When all of the doors are closed, these lamps can be individually activated by depressing the corresponding lens. When any door is open, depressing the lamp lenses to activate the lamp switches will not turn the lamps OFF.

The instrument cluster monitors the door ajar switches. When a door is open the instrument cluster grounds the low side drivers to turn ON the lamps. Upon closing all doors, the instrument cluster initiates a 30 second timer. If any of the doors are opened during the "time out" cycle, the instrument cluster will reset the timer until all doors are closed. The instrument cluster will faid to OFF when the doors are closed and the ignition is turned ON, the time out expires or the power locks are activated.