Hmm the 12 volt forum suggest at
http://www.the12volt.com/carsecurity/page1.asp I could easily add any alarm thus:
First locate the motor leg wire of the driver's door lock actuator that shows (+) 12 VDC while unlocking. Connect this lead to the"disarm #1" lead of the alarm.
Next locate the motor leg wire of any other door lock actuator that shows (+) 12 VDC while unlocking during the second press of the button. Connect this lead to the "disarm #2" lead of the alarm.
Now locate any motor leg wire that shows (+) 12 VDC when the doors are locking. Conect this to the "arm" lead of the alarm.
If you intend to inhibit the trunk/hatch release during remote opening, locate the lead that shows (+) 12 VDC while opening. Connect this to the (+) positive inhibit lead of the alarm.
Will it work?