Car Alarms: 96 toyot rav4 alarm system, valet mode, starter wire

Question
I have a used 96 RAV4, which I purchased 18 months ago.  I have never heard the alarm go of until a week ago. I had left the engine on to go into a store and my wife turned the ignition switch to acc (turned the engine off but left the pwr on.) I am assuming that something else probably occurred unawares.  The red alarm light will blink rapidly just before it goes off.     

If I do not keep a key 'spare' in the ignition or disconnect the battery, it goes off every 5 minutes.  
Basically I need to reset the alarm or pull the fuse to disable.

Please talk me through resetting the alarm and/or pulling the alarm fuse for a 96 RAV4.  

Answer
If it is a factory installed security system you may loose the keyless entry if you pull the fuse.  I would suggest trying to get the system into valet mode.  Valet mode is normally achieved by turning the key to the run position and pressing the valet button, normally mounted in the driver's kick panel area.  Here is a generic how to on alarm removal:

Typically an alarm system would be installed on the driver's side interior of the vehicle.  This system would have been tapped into the ignition switch wiring running down from the key.  If you remove the dash panel(s) under the steering column you should be able to locate where the harness was added that goes to the alarm.  Disconnect each wire that was tapped in and insulate the factory wiring.  You will also see that at least one of the wires was cut, this is the vehicle starter wire that runs from the key to the starter.  This wire needs to be restored, I always recommend soldering all connections but crimp connectors should also work.  Make sure that you remove all connections to the alarm and that any wires that may be exposed are insulated and mounted in a way that they will not interfere with any moving parts and do not run the risk of shorting out.  Remember to take your time and follow each connection running from the brain of the system, leaving one wire connected that you are unsure of the function could cause problems in the future so be sure to remove every wire.

I would also suggest checking out this site, although it may not be the exact model you have it will still cover the basics of Toyota's VIP systems.  http://www.parksoffroad.com/tacomamods/alarminfo/alarminfo.htm