Car Alarms: nissan alarm, valet mode, nissan frontier

Question
I have a 2004 nissan frontier Every thing works on my alarm exept it used to beep once when you arm it lights just flash no horn sounds horn works  it is a factury alarm. alarm horn works when it goes off  any anwser how to get the horn to beep once when it armed?

Answer
Should be no problem really.
It appears from your expaination, that the
car alarm is in service mode.

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 goes off, and the siren chirps twice.
(Your valet switch might be the toggle (on/off) type.
in this case, key on, flip switch in oposite direction,
key off.)

This should reset the alarm.

Just Repeat these steps to place it
back to valet mode.

That should do it.
Let me know what happens.

ALARMTEK
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