Exterior Lighting

EXTERIOR LIGHTING

Headlamps
The headlamps are controlled by the smart junction box (SJB). The headlamp and multifunction switches are constantly monitored by the SJB. The SJB processes information (such as low beam, high beam or flash-to-pass requests) from these switches and outputs voltage to the headlamps. This is the same for the low and high beams and flash-to-pass positions. In the event of headlamp switch invalid or missing data failures, the exterior lamps are illuminated. There is also a headlamp battery saver feature. This feature turns off the headlamps 10 minutes after the ignition switch is turned OFF.

Stoplamps
The stoplamp outputs are controlled by the SJB. The stoplamp switch is monitored by the SJB. When the SJB detects the brake pedal is applied, the SJB processes this information and outputs voltage to the stoplamps.

Turn Signal and Hazard Lamps
All turn signal outputs are controlled by the SJB. The multifunction switch and the hazard switch are monitored by the SJB. When the multifunction switch is in the left or right turn position, or the hazard switch is engaged, the SJB processes this information and outputs voltage to the appropriate turn signal and hazard lamps. All turn signal lamps provide a lamp outage indication.

Parking, Rear or License Plate Lamps
The parking, rear, license plate and side marker lamps are controlled by the SJB. The headlamp switch is monitored by the SJB. When the headlamp switch is in the HEADLAMPS ON or PARKING LAMPS ON position, SJB processes this information and outputs voltage to the parking, rear, licence plate and side marker lamps.

Fog Lamps
The fog lamps are controlled by the SJB. The SJB monitors inputs from the headlamp switch and the multifunction switch. The SJB will only turn the fog lamps on when ignition switch is in the RUN position, the parking lamps are on and the high beams are off. When the fog lamp switch is engaged, the SJB then activates the fog lamp relay, providing power to the fog lamps.

Reversing Lamps
The reversing lamps are controlled by the SJB. The powertrain control module (PCM) sends a message through the communication network indicating the transmission is in REVERSE (R). The SJB processes this information and outputs voltage to the reversing lamps.