Car Alarms: 2003 f150 factory installed alarm, dash area, alarm button

Question
My husband was driving the ford, rolled down the back window so that he could parallel park. The alarm started going off. Mind you the truck was still running. He parked, tried pushing in the switch under the steering wheel, and the alarm wouldn't stop going off. He tried turning off car, removing keys from ignition, push the alarm button on remote, still wouldn't disarm. Tried pushing button again under steering wheel, still wouldn't disarm. Started car, drove home. Mind you the alarm was going off while driving, go home. Removed keys from ignition, still going off. Had to finally pull the battery cable to stop the alarm from going off.
Any help you can give? I've heard that maybe his truck battery may be going dead. I don't know. Help.

Answer
This is what I think is going
on....

The alarm seems to be in long tamper mode.
You will need to reset.

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, until the installed
LED (the blinking light)
in your dash area goes on solid,
and the siren chirps once.

This should reset the alarm.

At this point, the only thing working would
be the keyless entry from the alarm,
if it came equipped that way.

Just Repeat these steps to place it
back to usable armed mode.
You may get 2 chirps, confirming it,
and the lights may flash twice as well.

That should do it.
If you want to remove it at this point,
take it to your neighborhood installer
for this, or buy the wiring chart
(Go to: www.vehiclewires.com)
for the vehicle, and reverse engineer it wire
by wire, until safely removed.

If it does not work out this way,
you will have to replace the system
with one you know how to operate
and what to expect. Don't want to
get stuck in another bad situation.

Let me know what happens.

ALARMTEK
INSTALLSUPPORT.COM