Car Alarms: alarm going off, dash area, flip switch

Question
Daughter has borrowed her big brother's truck with an excalibur alarm.  The car battery died and was replaced.  She woke up to a dead truck.  Truck was jumped and the battery can not be disarmed.  We don't know how to disarm the alarm.  Can you help us please?  She's 350 miles away.  Don't know the model number of the excalibur alarm.  The remote has 3 buttons.

Answer
Ok, try this.
Put the key in the ignition, and turn forward
all the way just before cranking. Then within
5 seconds, press and hold in the valet/overide
button, found under the dash area,
until the installed LED (the blinking light)
in your dash area comes on solid.
(Your valet switch might be the toggle (on/off) type.
in this case, key on, flip switch in oposite direction,
key off.)

This should be valet. This overides
the starter kill relay in the alarm harness,
and returns the car back to disarmed mode.

The only thing that will work now on your system,
is the keyless entry if installed.

Just Repeat these steps to rearm your system.

That should do it.

Let me know what happens.

ALARMTEK
STARTERDISABLE.com