Chrysler 2004 300M - Manual (Page 24)

To set the alarm:
1. Remove the keys from the ignition switch and get out
of the vehicle.
2. Lock the door using either the door key, power door
lock switch, or the Keyless Entry Transmitter and close all
doors.
3. The SET light on the top of the instrument panel will
flash rapidly for 16 seconds. This shows that the system
is arming. If the light comes on but does not flash, the
system is still armed, but there is a problem in the trunk
circuit. After 16 seconds the SET light will continue to
flash slowly. This shows that the system is fully armed.
To disarm the system:
Unlock a front door using either the key or the Keyless
Entry Transmitter.
Tamper Alert
If the horn sounds 3 times when you unlock a front door
using either a key or the Keyless Entry Transmitter, the
alarm had been triggered. Check the vehicle for tamper-
ing.
24 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE