The theft-deterrent system feature provides an audible and visual alarm when unauthorized access to the vehicle is detected. When an intrusion is detected by any door, liftgate or liftgate glass latch switches, or the bonnet switch, an open signal is sent to the generic electronic module (GEM). When the GEM receives a signal indicating intrusion into the vehicle, the GEM cycles a ground supply to the horn and flasher relays. The relays close causing the flashers to flash and the horn to sound. The theft-deterrent system feature does not arm until 20 seconds elapses after the GEM receives a lock command and detects all latch switches are closed. If all switches are closed the flashers will flash. The theft-deterrent system will disarm only when: