Cornering Lamps

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Without Vehicle Stability Enhancement System (VSES)

The left and right cornering lamps are located within the headlamp assemblies. The BCM will illuminate the cornering lamp only during turn signal operation. When a left or right turn signal is activated, the BCM applies ground to the appropriate cornering lamp relay control circuit energizing the LF or RF CRN LAMP PCB RELAY. With the relay energized, battery voltage is applied through the switch side of the relay, the CRN LAMP fuse, and the cornering lamp supply voltage circuit illuminating the cornering lamp until the turn signal is turned OFF.

With Vehicle Stability Enhancement System (VSES)

On vehicles equipped with VSES the cornering lamps will illuminate when a turn signal lamp is activated or a change in steering wheel direction. When a left or right turn signal is activated, the BCM applies ground to the appropriate cornering lamp relay control circuit energizing the LF or RF CRN LAMP PCB RELAY. With the relay energized, battery voltage is applied through the switch side of the relay, the CRN LAMP fuse, and the cornering lamp control circuit illuminating the cornering lamp until the turn signal is turned OFF. The cornering lamps will also illuminate when the steering wheel is turned a 1/4 turn to the left or right without a turn signal being activated. The BCM receives a serial data message from the electronic brake control module (EBCM) indicating the steering wheel position. The EBCM receives steering wheel positions via the steering angle sensor. When the BCM receives the serial data message from the EBCM that the steering wheel has changed position a 1/4 turn or greater in either direction and the vehicles speed is greater than 12.8 km/h (8 mph), the BCM will respond by applying ground to the appropriate cornering lamp relay control circuit energizing the LF or RF CRN LAMP PCB RELAY. With the relay energized, battery voltage is applied through the switch side of the relay, the CRN LAMP fuse, and the cornering lamp control circuit illuminating the appropriate cornering lamp until the steering wheel returns to the straight or home position.