The exterior lighting system includes the following components:

This system also includes all wiring controls and related hardware required for the operation of these lamps.

The headlamps may be turned on two different ways. First, when the driver places the headlamp switch in the ON position, for normal operation. Second, with the headlamp switch placed in the OFF position, during automatic headlamp operation in low light conditions.

The HDLP left fuse and the HDLP right fuse in the underhood fuse block, supply battery positive voltage to both low beam lamps and high beam lamps at all times. The low beam and high beam circuits continue to the headlamp switch. When the headlamp switch is placed in the ON position, it provides a ground path for the low beam or high beam lamps through G201. The headlamp switch also provides a input signal to the body control module (BCM) in order to determine if the headlamps are ON.

The automatic headlamps operate in low light conditions, the BCM will pull the headlamp relay control circuit low, energizing the relay. When the headlamp relay energizes, the relay provides a ground path for the low beam or high beam lamps through G201, depending on the headlamp switch position.

Both the headlamp switch and the headlamp relay can provide a ground for the headlamps for manual or automatic headlight operation. The headlights may be switched to high beam by pulling the headlamp switch handle toward the driver until the high beams are activated. When the headlamp switch is placed in the HIGH BEAM position, the indicator lamp and the high beam lamps are grounded and illuminate.

The flash to pass feature can be operated with the low beams OFF or ON. The high beams may be momentarily turned on or flashed with the dimmer switch handle. When the headlamp switch handle is pulled toward the driver, the flash-to-pass switch closes grounding the high beam circuit at G201, both high beams will remain on until the driver releases the switch handle. If the low beam headlamps were on during a flash-to-pass operation, they will remain on.

The front turn signal lamps are used as daytime running lamps and turn signals lamps. The body control module (BCM) illuminates the front turn signals lamps in a non flashing mode for daytime running lamps (DRL) operation. If the turn signal switch is activated during Daytime Running Lamp operation, the appropriate turn signal will flash.

The daytime running lamps (DRL) are designed to be automatically illuminated when the ignition is ON and the outside (ambient) light level is high as in daytime conditions (day mode). The daytime running lamps (DRL) will not operate if the ambient light levels are too low (night mode). Light levels are detected by the ambient light sensor, a light sensitive transistor that varies its voltage signal to the BCM in response to changes to the ambient light level. When the BCM receives a day mode signal from the ambient light sensor it will then illuminate the DRL lamps. The automatic headlamps and parklamps will not operate when the DRL lamps are on.

In the day mode, the ambient light sensor detects daylight and the BCM applies voltage to the LH and RH front turn signal lamps illuminating the lamps under the following conditions:

The automatic headlamps and parklamps are designed to automatically illuminate when the ignition is ON and the outside (ambient) light level is low as in nighttime conditions (night mode). Light levels are detected by the ambient light sensor, a light sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes to the ambient light level. When the BCM receives a low light mode signal from the ambient light sensor it will then energize the parklamp and headlamp relays illuminating the headlamps and parklamps. The DRL lamps will not operate when the automatic headlamps and parklamps are on.

In the low light mode, the ambient light sensor detects low light level, the BCM turns OFF the front turn signal lamps and grounds the park lamp relay and headlamp relay control circuits, turning ON the headlamps and parklamps under the following conditions:

If the engine stalls with the DRL in the low light mode, the BCM turns OFF the headlamps while the engine is being cranked. The parklamps will remain ON while the engine is being cranked.

The body control module (BCM) will not operate the headlamps or the exterior lamps, if the park brake is applied before the ignition switch is turned to the RUN position. This allows the driver to start the vehicle and keep the headlamps OFF, as long as the park brake is applied. The BCM will activate the headlamps when the park brake is released with the ignition switch in the RUN position. This feature functions only when the park brake is applied before the ignition switch is turned to the RUN position. The headlamps will not turn OFF, if the park brake is applied after the ignition switch is turned to the RUN position.

Pressing the fog lamp switch button will turn the fog lamps ON, as long as the headlamp switch is NOT in the OFF position. When the fog lamps are ON, an indicator on the fog lamp switch will illuminate. Pressing the switch again will turn the fog lamps OFF.

The FOG relay in the underhood fuse block controls the fog lamps. The switched side of the relay receives battery voltage at all times from the FRT Park FOG LPS Fuse. The coil side feed circuit of the fog lamp relay receives voltage from the HDLP fuses via an inactive high beam headlamp (the voltage will be pulled low with the high beams ON disabling the fog lamps). The body control module (BCM) will provide an enable signal to the fog lamp switch when the ignition is ON and the headlamp switch is in PARK or HEAD position. With the fog lamp enable circuit active and the fog lamp switch is pressed, a ground is applied to the fog lamp relay control circuit. This energizes the relay, closing the switched contact and applying battery voltage to the fog lamps turning them on. The fog lamps receive a constant ground from G101.

The turn signal lamps are made up of the front park/turn signal lamps and rear turn signal lamps. The front turn signal lamps flash with the rear turn signal lamps when a turn is initiated using the turn signal/multifunction lever. The turn signals will operate only with the ignition switch in the RUN position and will not operate during hazard flasher operation.

When the ignition is turned to the RUN position, battery voltage is supplied to the TURN SIGNAL, CORN LPS Fuse. Battery voltage is then applied through the TURN SIGNAL, CORN LPS fuse circuit to the hazard warning switch. The hazard switch supplies a turn signal flasher signal to the turn signal switch. With the turn signal switch in the LH or RH position the corresponding turn signal indicator, rear turn signal, and front turn signal receive the turn signal switch signal and will flash. The front turn signals receive the turn signal switch signal from the turn signal switch via the body control module (BCM) . The front turn lamps are grounded at G101. The rear turn lamps are grounded at G301 and G302.

The hazard switch receives battery voltage at all times through the HAZARD Fuse. When the hazard switch is placed in the HAZARD position, battery voltage is applied to all of the turn lamps and turn indicators simultaneously flashing them on and off.

The cornering lamps operate when a turn is initiated using the turn signal/multifunction lever. The cornering lamps will operate only with the ignition switch in the RUN position and will not operate during hazard flasher operation.

The TURN SIGNAL CORN LPS fuse supplies voltage to the turn signal switch when the ignition is in RUN. When the turn signal switch is placed in the LH or RH position the corresponding cornering lamp will receive voltage and illuminate. The cornering lamps are grounded at G101.

The front park lamps are made up of the front park/turn signal lamps and the front marker lamps. The rear park lamps are made up of the rear tail/turn signal lamps, rear sidemarker lamps, and rear license plate lamp.

The headlamp switch is used to operate the park lamps and rear license plate lamps. Turning the headlamp switch to the park position will turn ON the park lamps. The park lamps can also be illuminated by the body control module (BCM) during automatic headlamp operation in low light mode.

When the headlamp switch placed in the PARK position battery voltage is supplied through the headlamp switch to both the TAILLAMPS fuse and the FRT PARK LPS fuse. Battery voltage is then applied through the TAILLAMPS fuse and the FRT PARK LPS fuse to the front park lamps, tail lamps, and rear license plate lamp. The tail lamps and rear license plate lamps receive ground at all times from G302. The front park lamps receive ground from G101.

The park lamps can also be controlled by the park lamp relay during automatic headlamp operation in low light mode. Both the coil and the switched sides of the park lamp relay receive battery voltage at all times. When the BCM is in low light mode, the BCM then applies a ground through the park lamp relay control circuit to the park lamp relay. This energizes the relay closing the switch contact and applies battery voltage to both the TAILLAMPS fuse and the FRT PARK LPS fuse. Battery voltage is then applied through the TAILLAMPS fuse and the FRT PARK LPS fuse to the front park lamps, tail lamps, and the rear license plate lamps. The tail lamps and rear license plate lamps receive ground at all times from G302. The front park lamps receive ground from G101.

The stop lamps consist of a center high-mounted stop lamp and the LH and RH rear stop. The LH and RH rear stop are double-filament bulbs that are used as stop lamps.

The stop lamp switch receives battery voltage at all times through the STOP LAMPS fuse. When the brake pedal is pressed, the stop lamp switch closes and battery voltage is applied to the center high-mounted stop lamp and to the rear stop lamps. The center high--mounted stoplamp and the stop lamps are grounded at G302.

The back-up lamps operate when the ignition switch is in the RUN position and the transaxle range selector lever is in REVERSE.

The R/CMPT REL fuse supplies battery voltage at all the times to the park/neutral position switch. When the park/neutral position switch is place in REVERSE battery voltage is applied to the backup lamps illuminating the lamps. The backup lamps receive a ground signal from G301 and G302.

The body control module used in this vehicle controls the lighting system through circuits that enable both the exterior lamp functions of park, head and fog lamps as well as the interior lamps. The BCM opens these enabling circuits 20 minutes after the ignition switch is turned OFF with no lamp switch activity. If the ignition switch is turned to any position other than OFF, or if a lamp switch is activated, during this 20 minute period the timer will reset for another 20 minutes.

High Beam

The high beam indicator is hard wired to the headlamp switch. The high beam indicator illuminates when the headlamp switch is in the high position (signal circuit is low).

Turn Signals

The left and right turn signal indicators are hard wired to the turn signal switch and the hazard switch. The turn signal indicator illuminates when the turn signal lamps supply voltage circuit is active. The body control module (BCM) is also hard wired to the turn signal switch. If the BCM determines that the turn signal flasher signal circuit is active for more than 1.2 km (0.75 mi), the BCM activates an audible warning.

The BCM processes the inputs and the controls. The ambient light sensor supplies the BCM with a signal for daytime conditions or for low light conditions.

The driver controls include the following components: