The exterior lighting consist of the following lamps:

The fuse block - rear supplies battery positive voltage to the reverse lamp relay control and to the switch terminals of the REVERSE relay. Battery positive voltage to the switch terminal is available through the PARK/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 relay and the backup lights illuminate. Current flows from the REVERSE relay switch to the backup lamps. The backup lamps have ground at G401 and at G402.

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 and night time conditions are sensed. The exterior lamps will be turned off automatically after the delay period elapses. The delay period ranges from 0 seconds to 3 minutes in 12 second increments. The twilight delay 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 the ON position, the DIM will automatically control the headlamps on/off status depending on the night time/daytime 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 night time conditions. The sunload sensor assembly is a light sensitive photocell that varies its voltage signal to the control module in response to changes to the outside, ambient light level. When the control module receives this signal, the control module sends a class 2 message to the DIM and to the rear integration module (RIM).

During DRL operation, the low beam headlamps are on at a reduced intensity for daytime running lamp (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.

With the ignition switch in the ON position, the fog lights will illuminate when the driver presses the fog lamp switch. The fuse block - underhood supplies battery positive voltage to the switch circuit of the FOG LP relay. Ignition voltage is available to the FOG LP relay coil. The dash integration module (DIM) controls the FOG LP relay coil. When the fog lamp switch is pressed ON, the front fog lamp switch signal of the HVAC control module with C67 or instrument panel module (IPM) with CJ2 has ground through the fog lamp switch. The control module sends a class 2 message to the DIM, which energizes the fog lamp relay control circuit of the FOG LP relay. When the DIM energizes the FOG LP relay, the current flows from the FOG LP relay switch to both front fog lamps. The front fog lamps have ground at G401. The state of the front fog lamps (ON or OFF) will remain the same until the front fog lamp switch is pressed again, even between ignition cycles. The park lamps or low beam headlights must be ON in order for the fog lights to be illuminated. Fog lamp operation will be cancelled whenever the park lamps, are turned OFF or the high beam headlights have been selected.

The headlamps can be used 3 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 low beam 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 through the headlamp high beam relay control circuit. 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.

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 park lamps are also turned on with the fog lights. 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 dash integration module (DIM) has a ground path through the headlamp switch. The DIM provides battery positive voltage to the park lamp relay 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 coil. 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 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 I/P lamp fuse supply voltage 1 circuit of the DIM, for interior lamps backlighting. The license lamps are grounded at G401.

When the remote control door lock receiver (RCDLR) receives a door UNLOCK command from the remote function actuator (RFA) 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, PRK LP and REVERSE relays. The DIM will turn on the backup lamps and flash the headlamps and park lamps twice, then keep them on approximately 20 seconds or until a door is opened. When the RCDLR receives a door LOCK command from the RFA transmitter, The DIM will flash the headlights and park lights once. In daylight conditions, the DIM will activate the PRK LP relay only to flash the park lamps twice with a door UNLOCK command and once with a door LOCK command from the RFA transmitter.

The T/SIG HAZ fuse in the fuse block - rear supplies battery positive voltage to the turn signal/hazard flasher module. The module is part of the hazard switch assembly. 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 or ACCY 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/multifunction 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, their instrument panel cluster (IPC) indicator and head up display (HUD) indicator if HUD equipped. 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 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.

To provide battery run down protection, the exterior lamps will be deactivated automatically under certain conditions. The dash integration module (DIM) monitors the state of the headlamp switch. If the park or headlamp switch is ON when the ignition switch is placed in either the CRANK or RUN position and then placed in the OFF position, the DIM initiates a 10 minute timer. At the end of the 10 minutes, the DIM will turn off the control power output to the park and headlamp relay coils, deactivating the exterior lamps. This feature will be cancelled if any power mode other than OFF becomes active. The DIM will disable battery run down protection if any of the following conditions exist. The park or headlamp switch is placed in the ON to OFF position and back to the ON position during battery run down protection. The DIM determined that the park or headlamp switch was not active when the ignition was turned OFF.