Circuit Description
WARNING: This page is about a different car, the 2005 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The ignition mode switch has 3 LEDs that indicate the vehicle power mode. All these LEDs have the voltage supplied from the body control module (BCM) through the ignition mode switch supply voltage circuit. The ground path for each LED is controlled by the BCM.