Exterior Lighting

Exterior Lighting

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The exterior lighting system consists of the following components:

- Headlamp assemblies
- Fog lamps (if equipped)
- SJB
- Stoplamp switch
- Headlamp switch
- Multifunction switch
- Light sensor (if equipped)
- High mounted stoplamp
- Rear lamp assemblies
- License plate lamps
- Trailer tow connector (if equipped)
- Trailer tow relays (if equipped)

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 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 is 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.

Lamp Assembly Condensation

Exterior lamps are vented to accommodate normal changes in pressure. Condensation can be a natural by-product of this design. When moist air enters the lamp assembly through the vents, there is a possibility that condensation can occur if the temperature is cold. When normal condensation occurs, a thin film of mist can form on the interior of the lens. The thin mist eventually clears and exits through the vents during normal operation. Time to clear the lens of acceptable mist varies with ambient humidity and lamp types. Normal condensation clears from any lamp in 48 hours under dry conditions.

Do not replace a lamp assembly with acceptable levels of condensation such as:

- Presence of thin mist (no streaks, drip marks or droplets are present)
- Fine mist covers less than 50% of the lens

Examples of unacceptable moisture (usually caused by a lamp housing leak):

- Water puddling inside the lamp
- Large water droplets, drip marks or streaks present on the interior of the lens

Headlamps

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 SJB supplies voltage to the headlamps when demanded.

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. To adjust the autolamps time delay, refer to Autolamps Time Delay Adjustment Autolamps Time Delay Adjustment.

Headlamps On With Wipers On Feature

On vehicles equipped with autolamps, there is 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 3 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.

For information or diagnostics regarding the headlamps on with wipers on feature, refer to Wipers and Washers Description and Operation.

Stoplamps

The stoplamp switch is located on the brake pedal assembly. 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 position, the SJB 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.

When the hazard switch is pressed, the SJB cycles the voltage to all the turn lamps on and off approximately 80 times per minute.

Parking Lamps

The SJB supplies voltage to the parking lamps when demanded. The parking lamp system includes the following lamps:

- Front parking lamps
- Front side marker lamps (Escape)
- Rear parking lamps
- License plate lamps

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 START position, the parking lamps are on, and the high beam headlamps are off.

Reversing Lamps

When the transaxle is placed in REVERSE (R), the digital Transmission Range (TR) sensor (automatic transaxle - non-hybrid), the PCM (hybrid) or the reversing lamp switch (manual transaxle) provides 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

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 Battery Junction Box (BJB).

Vehicles not equipped with trailer tow require a Ford authorized accessory kit, if this option is to be added. Adding bulbs/lighting to existing circuits can cause the SJB to shut down the circuit and set a DTC due to the unexpected current flow.

Daytime Running Lamps (DRL)

The Smart Junction Box (SJB) can be configured to turn the Daytime Running Lamps (DRL) on for this vehicle. Refer to Module Configuration Testing and Inspection for programmable parameter information.

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

The SJB illuminates 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 transaxle is not in PARK (P) (automatic transaxle).
- The parking brake is not applied (manual transaxle).