Cadillac 1998 Seville Owner's Manual page 76

To arm the system, do the following:
1. Open the door.
2. Lock the door using the power door lock switch or
the RKE system with the door open. The
SECURITY light should come on and stay on.
off within approximately 30 seconds.
3. Close all the doors. The SECURITY light should go
When the theft system activates, the horn will sound and
the lamps will flash for about 30 seconds when the door
or trunk is opened without the key or RISE system.
Remember, the theft-deterrent system won't arm if you
lock the doors with a key or use the manual door lock. It
activates only if you use a power door lock switch with
the door open or the RKE system.
To avoid activating the alarm by accident:
The vehicle should be locked with the door key or
the manual door lock switch after the doors are
closed if you don't want to arm the theft-deterrent
system.
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Always unlock a door with a key or use the RKE
system. (Pressing the unlock button on the RKE
transmitter disables the theft-deterrent system.)
Unlocking a door any other way will activate the
alarm when a door or the trunk is opened.
If you activate the alarm by accident, unlock the driver's
door with your key. You can also turn off the alarm by
using the unlock button of the RKE system, or by
starting the car with a valid key.
Changes or modifications made to this system by other
than an authorized service facility could void
authorization to use the theft system.
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 or the RKE
system and close the door. Wait 30 seconds until the
SECURITY lamp goes off.
3. Reach in and unlock the door using the manual lock
and open the door. The horn will sound and the
hazard lights will flash.
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" in the
Index. 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 optional
theft-deterrent system when leaving your vehicle.