Part 3 of 3

DOOR AJAR SWITCH
Door Ajar Switch
The door ajar switches are integral to the door latch mechanism. The front door ajar switches are actuated by the front door latch mechanisms, and are hard wired between a body ground and the Driver Door Module (DDM) or the Passenger Door Module (PDM). The rear door ajar switches are actuated by the rear door latch mechanisms, and are hard wired between a body ground and the Body Control Module (BCM) through the rear door and body wire harnesses.

The door ajar switches cannot be adjusted or repaired and, if faulty or damaged, the door latch unit must be replaced. For complete circuit diagrams, refer to the appropriate wiring information.

The front door ajar switches close a path to ground for the DDM or the PDM when a front door is opened, and opens the ground path when a front door is closed. The rear door ajar switches close a path to ground for the BCM when a rear door is opened, and opens the ground path when a rear door is closed. The DDM, PDM, or BCM read the switch status then send the proper switch status messages to other modules over the Programmable Communications Interface (PCI) data bus network. The door ajar switch status message is used by the BCM as an input for Vehicle Theft Security System (VTSS) operation.

Flip Up Glass Ajar Switch
The liftgate flip-up glass ajar switch is integral to the liftgate flip-up glass latch mechanism. The liftgate flip-up glass ajar switch is actuated by the liftgate flip-up glass latch mechanism, and is hardwired between a body ground, the Body Control Module (BCM) and the rear wiper motor module through the liftgate and body wire harnesses.

The liftgate flip-up glass ajar switch cannot be adjusted or repaired and, if faulty or damaged, the liftgate flip-up glass latch unit must be replaced. For complete circuit diagrams, refer to the appropriate wiring information.

The liftgate flip-up glass ajar switch can close a path to ground for the BCM and the rear wiper motor module when the liftgate flip-up glass is opened, and opens the ground path when the liftgate flip-up glass is closed. The rear wiper motor module uses the liftgate flip-up glass ajar switch input to control the rear wiper operation, and will park the rear wiper blade if this input indicates that the lift-gate flip-up glass is ajar. The BCM reads the switch status then sends the proper switch status message to other modules over the Programmable Communications Interface (PCI) data bus network. The liftgate flip-up glass ajar switch status message is used by the BCM as an input for Vehicle Theft Security System (VTSS) operation.

Liftgate Ajar Switch
The two liftgate ajar switches are integral to the two liftgate latch mechanisms. The two liftgate ajar switches are actuated by the liftgate latch mechanisms, and are hard wired with each other between a body ground and the Body Control Module (BCM) through the liftgate and body wire harnesses.

The liftgate ajar switches cannot be adjusted or repaired and, if faulty or damaged, the liftgate latch unit must be replaced. For complete circuit diagrams, refer to the appropriate wiring information.

Each of the liftgate ajar switches can close a path to ground for the BCM when the liftgate is opened, and opens the ground path when the liftgate is closed. The BCM reads the switch status then sends the proper switch status message to other modules over the Programmable Communications Interface (PCI) data bus network. The liftgate ajar switch status message is used by the BCM as an input for Vehicle Theft Security System (VTSS) operation.

READING LAMP
The overhead console in this vehicle is equipped with two individual reading and courtesy lamps.Each lamp has its own switch, bulb, reflector and lens; but both lamps share a common lamp housing within the overhead console.

The overhead console reading and courtesy lamps operate on battery current that is provided at all times, regardless of the ignition switch position. The ground feed for the lamps is switched through the integral reading and courtesy lamp switches or through the door jamb switches.

The reading and courtesy lamp lenses and the lamp housing and reflector unit are serviced only as a unit with the overhead console housing.The reading and courtesy lamp switches, bulb holders and wiring are only available as part of the overhead console wire harness.

For service of the reading and courtesy lamp bulbs, (Refer to ELECTRICAL/LAMPS/LIGHTING - INTERIOR/READING LAMP - REMOVAL). For diagnosis of the reading and courtesy lamps, refer to the appropriate wiring information.

All reading and courtesy lamps located in the overhead console are activated by the doorjamb switches. 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.

TRANSMISSION RANGE INDICATOR ILLUMINATION
The Transmission Range Indicator Lamp, mounted on the floor console, uses electroluminescent technology as the light source. This lamp requires a 120 volt AC signal that is provided by a power converter included as part of the assembly. The module is not serviceable separately Because of a potential shock hazard, diagnostic testing of the lamp assembly should be avoided Refer to TRANSMISSION, Range Selector Assembly REMOVAL and INSTALLATION.