Car Alarms: Need to Disable Alarm, nissan altima, shock sensor


Question
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Followup To
Question -
I have a Nissan Altima equipped with an aftermarket alarm.  I can find nothing on the equipment under the hood that would indicate the brand or model.  I did not know the alarm existed until I accidentally armed it, somehow, with the remote.  I have no idea how to disarm it.  I have tried every conceivable remote button combination, but nothing works.  Can you help?  Thanks.
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 goes on solid, and the siren chirps once.
(Your valet switch might be the toggle (on/off) type.
in this case, key on, flip switch in opposite direction,
key off.)

This should reset the alarm, and reset
the grounded relay on the starter wire,
(if installed)
allowing you to start it. At this point,
the only thing working would be
keyless entry from the alarm,
if it came equipped.

Just Repeat these steps to place it
back to usable armed mode.

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 (www.wirewerx.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
CARALARMSTORE.com

I tried your suggestion but am unable to find any kind of button or switch under the dash.  What does it usually look like, and is it supposed to be mounted or hanging loose?  Could it be in a different location?  All I did find was a shock sensor labeled "Audiovox AS-9499."  Any suggestions?  Thanks.

Answer
That is the normal location. It's also possible
that it was not installed at all. The button is
a spring loaded or, a flip type toggle. Since this
is an Audiovox system, try contacting my friend Chris
on the tech desk there. CTURSI@AUDIOVOX.COM
He can help you on the alarm specifics, but
you will still need to disable it, so look around
a bit more under the dash area for the valet switch
prior to writing to Chris.

Good hunting.

ALARMTEK