moynah, check out this thread for additional info on Alarm/Siren issues:

https://www.crossfireforum.org/forum...dle-night.html

There are any number of items in the Security System that could be faulty or intermittent (bad switch) that could arm and trigger an Alarm.

If it was me, I would first lean towards a battery replacement (a simple move).

Then move on and change the actual Siren unit (a little harder to replace, but not a deal breaker).

A battery should run less that $100 and the Siren can be found for around $60 (US of A dollars).

A small investment before you break the bank for a BCM (or ditch the car because of an Alarm horror show)...

Good luck and post any updates on how it goes...

From the manual page 1,215...

'ALARM TRIPS ON ITS OWN'

Possible Causes:

FALSE GLOVE BOX SWITCH SIGNAL
FALSE LIFTGATE LOCK SWITCH SIGNAL
FALSE HOOD AJAR SWITCH SIGNAL
FALSE LEFT DOOR AJAR SWITCH SIGNAL
FALSE RIGHT DOOR AJAR SWITCH SIGNAL
FALSE IGNITION SWITCH SIGNAL
FALSE BRAKE LAMP SWITCH SIGNAL
FALSE ANTI-THEFT TOW SENSOR SIGNAL
INTERMITTENT CONDITION
For a complete Vehicle Theft Security System Circuit Diagram, Refer to Page 8Q-44.