The exterior lighting consist of the following lamps:

The headlamps can be used three different ways.

For normal low beam headlamp operation, ground is applied at all times from G200 to the headlamp switch. When the headlamp switch is placed in the HEAD position, ground is applied through the headlamp switch ON signal circuit to the dash integration module (DIM). The DIM then applies a ground through the headlamp relay control circuit to the headlamp dimmer switch. When the headlamp dimmer switch is in the LOW position ground is then applied through the headlamp dimmer switch to the HDLP LO BM relay in the underhood fuse block. This energizes the relay allowing battery positive voltage to be applied through the HDLOBML and HDLOBMR fuses to both left and right headlamps. The ground for the left headlamp is applied at all times from G103 and the ground for the right headlamp is applied at all times from G401.

For normal high beam headlamp operation, ground is applied at all times from G200 to the headlamp switch. When the headlamp switch is placed in the HEAD position, ground is applied through the headlamp switch ON signal circuit to the DIM. The DIM then applies a ground through the headlamp relay control circuit to the headlamp dimmer switch. When the headlamp dimmer switch is placed in the HIGH position, ground is applied through the headlamp dimmer switch to the HDLP HI BM relay. This energizes the relay and allows battery positive voltage to be applied through the HDHIBML and HDHIBMR fuses to both left and right high beam headlamps. The ground for the left headlamp is applied at all times from G103 and the ground for the right headlamp is applied at all times from G401.

For normal flash to pass operation (FTP), ground is applied at all times from G200 to the headlamp dimmer switch. When the headlamp dimmer switch is placed in the FTP position, ground is applied through the headlamp dimmer switch to the FTP input of the DIM. The DIM then applies a ground to the HDLP HI BM relay. This energizes the relay and allows battery positive voltage to be applied through the HDHIBML and HDHIBMR fuses to both left and right high beam headlamps. The ground for the left headlamp is applied at all times from G103 and the ground for the right headlamp is applied at all times from G401. The high beams will be on as long as the switch is held in the FTP position.

During ALC the low beam headlamps will be on at reduced intensity in daytime running lamp (DRL) operation during daylight conditions and low beam headlamps and park lamps on at normal intensity during low light conditions. If the windshield wipers are turned on while the DRL lamps are illuminated, the DIM receives a signal through the lights on with wipers signal circuit. The DIM will then turn on the normal low beam headlamps.

Twilight sentinel is a driver convenience that controls the exterior lamps in response to changes to the outside, ambient light level. The twilight sentinel will also keep the exterior lamps on for a pre-selected period of time after the ignition is turned to the OFF position with nighttime conditions sensed. The exterior lamps will be turned off automatically after the delay period elapses. The delay period ranges 0 seconds to 3 minutes in approximately 12 second increments. The twilight delay switch in the headlamp switch is supplied a reference voltage from the HVAC control module with C67 or instrument panel module (IPM) with CJ2. It is supplied a reference ground from the control module. The switch is a potentiometer that resistance varies as the switch is moved. The control module receives an input voltage proportional to the resistance of the potentiometer. The control module sends a class 2 message to the dash integration module (DIM) indicating the on/off status and delay length for the twilight sentinel. With the twilight sentinel in an ON position, the DIM will automatically control the headlamps on/off status depending on the low light/daylight status of the sunload sensor assembly. The DIM will use the twilight sentinel delay length to know how long to keep the headlamps and park lamps on after the ignition switch transitions from ON to OFF during low light conditions. The sunload sensor assembly is a light sensitive photocell that varies its voltage signal to the HVAC control module or IPM in response to changes to the outside (ambient) light level. When the HVAC control module or IPM receives this signal, the HVAC control module or IPM sends a class 2 message to the DIM and to the rear integration module (RIM). When the twilight delay switch is in ON, the DIM either turns on the daytime running lamp (DRL) or turns on the low beam headlights, after a 20 second delay depending on whether daylight or low light conditions are sensed. Any function or condition that turns on the headlights will cancel the DRL operation. During DRL the low beam headlamps are on for DRL operation in daylight conditions or low beam headlamps and exterior park lamps on in low light conditions. Battery positive voltage is supplied at all times to the coil side of the DRL relay. When a daylight condition exists the DIM applies a ground to the DRL relay through the DRL relay control circuit. This energizes the DRL relay, and applies battery positive voltage from the FOG/DRL fuse through switched contacts of the DRL relay to the DRL voltage supply circuit. The DRL voltage supply circuit uses the length of the wire to reduce the voltage to the DRL lamps. The DRL supply voltage is applied to the HDLOBMR fuse which allows battery positive voltage to be applied to the HDLOBML fuse and to the left and right low beam headlamps. Ground for the left low beam headlamp is supplied from G103 and ground for the right low beam headlamp is supplied form G401.

The park lamps, including the license lamps, are turned on when the headlamp switch is placed in the PARK or ON position or anytime the headlights are requested. The fuse block - rear supplies battery positive voltage to the switch contacts of the PRK LP relay. When the headlamp switch is in PARK or in ON, the park lamp switch on signal circuit of the DIM has a ground path. The dash integration module (DIM) provides battery positive voltage to the control circuit of the PRK LP relay. When the park lamps and/or the tail lamps are ON, the DIM energizes the PRK LP relay control circuit. This closes the switch contacts. Current flows from the PRK LP relay to the LH PARK LP and the RH PARK LP fuses. From the fuse, the current flows to the park lamps. The left park lamps are grounded at G103, G401 and G402. The right park lamps and the right tail lamps are grounded at G103 and G401. The DIMR fuse supplies battery positive voltage to the license lamps and to the DIM instrument panel lamp fuse supply voltage - 1 circuit, for interior lamps dimming. The license lamps are grounded at G401.

When the remote control door lock receiver module (RCDLR) receives a door UNLOCK command from the keyless entry transmitter, the RCDLR will send a class 2 message to the dash integration module (DIM). The DIM must have inputs that indicate that the ignition switch is OFF, all the doors are closed and the sunload sensor assembly is indicating low light conditions. The DIM will then activate the headlamp relay, PRK LP relay and REVERSE relay. The DIM will flash the headlamps and park lamps twice, then keep them and on approximately 25 seconds or until a door is opened, the backup lamps will stay on during this time. When the RCDLR receives a door LOCK command from the keyless entry transmitter, The DIM will flash the headlights and park lights once. In daylight conditions, the DIM will activate the PRK LP relay and headlamp relay to flash the park lamps and headlamps twice with a door UNLOCK command and once with a door LOCK command from the keyless entry transmitter.

The T/SIG HAZ fuse in the fuse block - rear supplies battery positive voltage to the turn signal/hazard flasher module. The turn signal/hazard flasher module has ground at G201. The turn signal lamps may only be activated with the ignition switch in the ON position. The IGN-1 fuse in the fuse block - rear supplies battery positive voltage to the turn signal switch. When the turn signal switch is placed in either the left or right position, current flow is from the turn signal switch assembly to the turn signal/hazard flasher module. The turn signal/hazard flasher module then sends an on-off voltage signal to either the left or right turn signals and their indicators. When the hazard switch is pressed, all the turn signal lamps will flash including both IPC turn signal indicators. The left turn signals have ground at G103 and at G402. The right turn signals have ground at G103 and G401. The turn signal switch supplies battery positive voltage to the cornering lamps, the left cornering lamp has ground at G103 and the right cornering lamp has ground at G401.

The STOP LP fuse in the fuse block - rear supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close. The battery positive voltage flows to the left stop lamp assemblies, to the right stop lamp assemblies and to the center high mounted stop lamp (CHMSL). The left stop lamp has ground at G402. The right stop lamp and the CHMSL have ground at G401.

The fuse block - rear supplies battery positive voltage to the control circuit and the switch terminals of the Reverse Lamp relay. Battery positive voltage to the switch terminal is available through the PRK/REV fuse. The dash integration module (DIM) sends a power mode message to the rear integration module (RIM) indicating that the ignition is in the ON position. When the driver selects the REVERSE position, the powertrain control module (PCM) sends a class 2 message to the RIM. The message indicates that the gear selector lever is in the REVERSE position. The RIM then energizes the Reverse Lamp relay and the backup lights illuminate. Current flows from the reverse lamp relay switch to the backup lamps. The backup lamps have ground at G401.

To provide battery run down protection, the interior lamps will be deactivated automatically under certain conditions. The rear integration module (RIM) initiates a 10 minute timer if the interior lamp relay control output is still active and the ignition switch is in the OFF position. The RIM timer is set to 3 minutes until the vehicle mileage is above 20.3-24.7 km (12.6-15.4 mi). At the end of the designated time, the RIM will deactivate the interior lamp relay, disabling the interior lamps. This feature will be cancelled if any power mode other than OFF becomes active. The RIM will reset the timer if any interior lamp switch is turned on, a door is opened or the remote control door lock receiver (RCDLR) is activated.