Exterior Lighting

EXTERIOR LIGHTING

NOTE:
- On vehicles equipped with perimeter lighting, this feature can be enabled or disabled. When enabled, the exterior lamps are illuminated when the UNLOCK button is pressed on the remote keyless entry (RKE) transmitter.
- The smart junction box (SJB) is also known as the generic electronic module (GEM).

Battery Saver

NOTE: Time-out is 1 minute if the vehicle has less than 80 km (50 miles).

The battery saver is internal to the smart junction box (SJB) and provides automatic shut-off of the headlamps and parking lamps after 10 minutes in order to save battery voltage. A timer is started when the ignition switch is turned to the OFF position with the headlamp switch in the HEADLAMPS ON position, or the headlamp switch placed in the headlamps on position with the ignition switch off. When the time-out period has elapsed, the voltage is automatically shut off to the lamps by the battery saver.

The battery saver does not control the parking lamps if the headlamp switch is in the PARKING LAMPS ON position.

Headlamps

Expedition
The headlamp system is a dual-beam pattern system. It consists of replaceable low/high beam bulbs. The headlamp assembly has the park/turn indicator lamp integrated into the headlamp assembly. The smart junction box (SJB) supplies voltage to the headlamps when demanded.

If the headlamps are on when the ignition switch is turned off, the battery saver feature turns off the headlamps after 10 minutes have elapsed.

Navigator
The headlamp system is a single-beam pattern system with a shutter used to expose more light at a higher angle when the high beams are activated. It consists of high intensity discharge (HID) headlamps (with replaceable bulbs) and shutters that are integral to the headlamp assembly. There are 2 HID relays located within the battery junction box (BJB) that are used to provide voltage to the ballast located within each headlamp assembly. The headlamp assembly has the park/turn indicator lamp integrated into the headlamp assembly. The SJB supplies voltage to the HID relay coils when demanded.

There is also a separate bulb that is used for the flash-to-pass feature. This bulb also shares functionality as a parking lamp when the parking lamps are on. When the flash-to-pass feature is activated, the brighter filament within the bulb illuminates.

If the headlamps are on when the ignition switch is turned off, the battery saver feature turns off the headlamps after 10 minutes have elapsed.

Autolamps
The autolamp system provides light sensitive automatic on/off control of the exterior lamps. The autolamp system keeps the exterior lamps on for a pre-selected period of time after the ignition switch is turned to the OFF position (20 seconds is the factory default setting). The pre-selected time lapse is adjustable up to approximately 3 minutes.

Headlamps On With Wipers On Feature
On late build vehicles equipped with autolamps, there is also a feature called the headlamps on with wipers on feature. If the headlamp switch is in the AUTOLAMPS ON position and the front wipers are on for more than 10 seconds (except during a mist wipe or while the wipers are on to clear washer fluid during a wash condition), the exterior lamps are turned on. When the ignition switch is changed to the OFF or ACC position, the headlamp switch is placed in the OFF position, or the front wipers are off for more than 30 seconds, the exterior lamps are turned off.

Stoplamps
The stoplamps are supplied voltage when the brake pedal is applied.

Turn Signal/Hazard Lamps
The front turn signal lamps are located within the headlamp assemblies. The rear lamps share functionality with the stoplamps. When the multifunction switch is placed in the LH or RH TURN positions, the SJB routes voltage to the LH or RH turn signal lamps. The SJB then cycles the voltage on and off approximately 80 times per minute. If a front or rear turn bulb is inoperative, the SJB cycles the voltage on and off approximately 160 times per minute.

The hazard switch is located on the center instrument panel finish panel. When the hazard switch is pressed, the SJB supplies voltage to all the turn lamps. The SJB cycles the voltage on and off approximately 80 times per minute.

Parking Lamps
The SJB supplies voltage to the parking lamps when demanded. The front parking lamps are located in the headlamp assemblies. The rear parking lamps are located in the rear lamp assemblies.

Fog Lamps
The fog lamp switch is integral to the headlamp switch. When the fog lamp switch is engaged, the SJB provides ground for the fog lamp relay coil (integral to the SJB), which then energizes and routes voltage to the fog lamps. The fog lamps can be turned on when the ignition switch is in the RUN or ACC position, the parking lamps are on, and the high beam headlamps are off.

Reversing Lamps
When the transmission is placed in REVERSE (R), the transmission control module (TCM) provides power and ground for the reversing lamp relay coil. The reversing lamps receive voltage when the reversing lamp relay is energized. The reversing lamps are located within the rear lamp assemblies.

Trailer Tow
The BJB supplies voltage to the trailer tow stop/turn, parking and reversing lamps. When the vehicle's rear stop/turn or parking lamps are illuminated, voltage is also supplied to a corresponding trailer tow relay (coil side) located in the BJB. When the reversing lamps are illuminated, voltage from the reversing lamp relay is also supplied to the trailer tow connector.

The trailer tow battery charge relay provides voltage to the trailer tow connector when the ignition switch is in the RUN position.

The vehicle comes equipped with circuitry to support trailer tow electric brakes.

Daytime Running Lamps (DRL)

Expedition

NOTE: The SJB must be configured when installing a new module.

The DRL system operates the low beam headlamps at a reduced intensity.

The SJB supplies pulse width modulated (PWM) voltage to illuminate the low beam headlamps at a reduced intensity when the following conditions are met:
- The ignition switch is in the RUN position.
- The headlamps have not been turned on by the autolamp system or the headlamp switch.
- The transmission is not in PARK (P).

Navigator

NOTE: The SJB must be configured when installing a new module.

The DRL system illuminates the fog lamps at full intensity.

The SJB energizes the fog lamp relay when the following conditions are met:
- The ignition switch is in the RUN position.
- The headlamps have not been turned on by the autolamp system or the headlamp switch.
- The transmission is not in PARK (P).