2005 Cadillac STS Owner's Manual - Page 85

The Theft-Deterrent system will not arm if: Testing the Alarm 1. From inside the vehicle, roll down the window, then get out of the vehicle, keeping the door open. 2. From outside of the vehicle, with the door open, lock the vehicle using the power door lock switch or the Keyless Access transmitter and close the door. Wait approximately 30 seconds until the security light goes off. 3. Reach in and unlock the door using the power door lock switch and open the door. The horn will sound and the exterior lamps will flash. You can turn off the alarm by pressing the unlock button on the keyless access transmitter or by starting the car. If the alarm does not sound when it should, check to see if the horn works. The horn fuse may be blown. To replace the fuse, see Fuses and Circuit Breakers on page 5-93. If the fuse does not need to be replaced, you may need to have your vehicle serviced. To reduce the possibility of theft, always arm the Theft-Deterrent system when leaving your vehicle. • The key is used to lock the driver's door. • The driver's door is locked using the power door lock switch after the doors are closed. If the vehicle is locked using the keyless access transmitter and a door, trunk lid or hood is open or not closed completely, the security light will flash for 60 seconds and then go off. At this time the theft-deterrent system will be armed but door, trunk lid or hood that was open or not completely closed will not trigger an alarm event. The door, trunk lid or hood that was completely closed will still be armed and will trigger a theft event if they are opened or tampered with. The vehicle can be programmed to automatically unlock the doors when you approach the vehicle and the keyless access transmitter is with you. See Vehicle Personalization on page 2-47. Pressing the unlock button on the keyless access transmitter or using the key to unlock the driver's door disarms the theft-deterrent system. Unlocking a door any other way while the system is armed will activate the alarm. 2-21