The exterior lighting consist of the following lamps:

The headlamps may be turned on two different ways. First, when the driver places the headlamp switch is placed in the HEADLAMP position, for normal operation. Second, with the headlamp switch placed in the OFF position, for automatic headlamp control.

The HEADLAMPS circuit breaker in the IP fuse block, supply battery positive voltage to the headlamp switch and dimmer switch. When the switch is placed in the HEADLAMP position, it provides voltage to the dimmer switch and a headlamp ON input to the Body Control Module (BCM). The headlamp circuit continues through the dimmer switch and, depending on the position of the dimmer switch, is connected to either the low beam or high beam headlamps. The headlamps are grounded at G101.

With the headlights in the low beam position, the high beams may be momentarily turned on or flashed with the dimmer switch handle. When the headlamp dimmer switch handle is pulled toward the driver, the flash-to-pass switch closes providing voltage to the high beam circuit. 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 headlights may be switched to high beam by pulling the dimmer switch handle toward the driver until the dimmer switch is activated. When the dimmer switch is placed in the HIGH BEAM position, the high beam circuit provides voltage to the high beam indicator in the IP.

If the headlight switch is left in the ON position, the headlights will remain on until turned off or the battery runs dead.

The BAT/MAIN MaxiFuse in the underhood junction block and fuses in the IP fuse block, supply battery and ignition positive voltage to the automatic headlamp control module. The ambient light sensor is a light sensitive variable resister that varies its voltage signal to the automatic headlamp control module in response to changes to the outside or ambient light level. With the ignition switch in the RUN position and the park brake OFF, the automatic headlamp control module operates the headlamps and parklamps when low light is detected. With the headlamp switch placed in the OFF position, and the ambient light sensor indicating low light conditions, the automatic headlamp control module will operate the low beam headlamps along with the position and tail lamps. If the engine stalls with the automatic headlamp control module in the low light mode, the automatic headlamp control module turns OFF the headlamps while the engine is being cranked. The automatic headlamp control module will turn ON the position and tail lamps while the engine is being cranked. Any function or condition that turns on the headlights will cancel the automatic headlamp operation.

With the headlamp switch in the HEADLAMP or PARK position, the front fog lights can be turned on with the fog switch. Fuse 28 in the underhood junction block, supplies battery positive voltage to the fog lamp relay switch contacts. The FRT PARK LPS Fuse supplies battery voltage to the fog lamp switch when the parklamps are ON. The front fog lamp relay coil is controlled by the front fog lamp switch. When the driver presses the front fog lamp switch, the relay energizes closing the contacts voltage is supplied through the closed contacts of the relay to the front fog lamps, front fog lamp switch indicator, and the BCM. The front fog lamps are grounded at G101. The front fog lamp indicator is grounded at G201. The BCM receives a front fog lamp on signal in order to monitor the front fog lamps status.

The rear fog lamps can be turned on when the headlamps are ON. The rear fog lamps are controlled by the BCM, and the rear fog lamp switch. A fuse in the IP fuse block supplies battery voltage to the rear fog lamp relay switch contacts and coil circuit. When the driver presses the rear fog lamp switch, the BCM receives a momentary ground , and the BCM energizes rear fog lamp relay closing the relay contacts. Voltage is supplied through the closed contacts of the relay to the rear fog lamps and the rear fog lamp switch indicator. The rear fog lamps are grounded at G402. The front fog lamp indicator is grounded at G201.

The position and tail lamps, including the license lamps, are turned on when the headlamp switch is placed in either the PARK or HEADLAMP position, or anytime the headlights are requested. With the headlamp switch placed in the OFF position, and the ambient light sensor indicating low light conditions, the automatic headlamp control module will operate the position, tail and license lamps. The BAT/MAIN MaxiFuse in the underhood junction block and the HEADLAMPS circuit breaker in the IP fuse block, supply battery positive voltage to the headlamp switch and the automatic headlamp control module. Current flow is from the headlamp switch or the automatic headlamp control module to the TAILLAMPS,LIC LAMPS fuse and FRT PARK LAMPS fuse of the fuse block. Current flow continues to the respective front position, tail lamps, and license lamps. The front position lamps are grounded at G101. The rear tail lamps are grounded at G401 and G402. The license plate lamps are a part of the tail lamp circuit and are grounded at G402. If the position and tail lamps are turned on after the ignition switch has been turned OFF, or is in the ACCY position, they will remain on until turned off or the battery runs dead.

The TURN SIGNAL CORN LPS and HAZARD fuse in the IP fuse block, supply battery and ignition positive voltage to the turn signal switch assembly. Battery and ignition positive voltage from the turn signal switch assembly, is also supplied to the hazard and turn signal lamp flasher module. The turn signal lamps may only be activated with the ignition switch in the ON or ACCY position. When the turn signal switch is placed in either the left or right position, current flow is from the flasher module's output to the turn signal switch assembly. The flasher module then sends an on-off voltage signal to either the left or right turn signals and their instrument cluster (IPC) indicator. When the turn signal switch is placed in either the left or right position, a repeater lamp also flashes along with it's respective front turn signal lamp. When the turn signal switch is placed in either the left or right position, a cornering lamp switch is also closed and the appropriate cornering lamp illuminates. When the hazard switch is pressed, all the turn signal lamps will flash including both IPC turn signal indicators. The hazard and turn signal lamp flasher module is grounded at G201. The front turn signals along with their respective repeater lamps and cornering lamps are grounded at G101. The rear turn signals are grounded at G401 and G402.

The STOP LAMP fuse in the IP fuse block, supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both left and right stop lamp assemblies and to the center high mounted stop lamp (CHMSL). The stop lamps are grounded at G401 and G402 and the center high mounted stop lamp (CHMSL) is grounded at G402.

The Fuse 29 in the underhood junction block, supplies battery positive voltage to the neutral safety and backup lamp switch. When the driver places the gear selector lever in the REVERSE position, the switch closes and the current flow is through the backup lamp switch to both backup lamps. The backup lamps are grounded at G402.