Security Indicator
The security indicator is controlled by the Body Control Module (BCM). The BCM monitors the ignition key resistor pellet. If the resistor pellet is incorrect, the BCM applies ground to the instrument cluster through circuit 728 at terminal B3 in order to illuminate the indicator. For a complete understanding of the security indicator operation, refer to the Vehicle Theft Deterrent (VTD) Operation.The BCM turns on the security indicator for approximately 5 seconds at bulb test.