Car Alarms: 1998 Trooper, valet mode, dash area

Question
QUESTION: What would make the factory alarm go off when the doors are locked and the truck is off. It stops when the truck is unlocked.

ANSWER: It's an after market system from your description.
Probably dealership installed when
it was purchased originaly.

The shock/impact sensor seems the culprit here.
It's likely to be found under the dash area, blinking
when anything taps on the underpanel.
Locate and either unplug or turn down.
To simply disarm it, locate and use the
valet/overide switch.

To start, look under the dash area for a button or,
a toggle switch. When you locate it, turn on the
ignition key, press and hold in the button (little
spring loaded micro button, red or black possibly)
until the alarm chirps 1 time. This should over ride
the system, and only the keyless entry part,
if installed, would still be operating.
The LED (light emiting diode) light in the dash
should also go on solid.=VALET/OVERIDE

This stops the alarm except for the keyless
entry if installed. The next step is to
either remove the alarm or, try to identify,
and get new remotes for it.

But once in Valet mode, it will allow the car
to start and operate like there was no alarm at all.

Let me know how it goes.

ALARMTEK
CARALARMMAN.COM

---------- FOLLOW-UP ----------

QUESTION: There is a light on the dash by the driver door. It looks like a factory unit to me. There is a red button on the key fob and it's a factory fob. Cant the dome light switch ot the hood sensor affect this

Thanks

Answer
Here's the thing, the "factory" alarm in this truck is part
of the door lock system. It already arms and disarms when the doors are locked or unlocked.

Describe the sound that yours makes (siren or horn honk)
and what lights flash (head lights or parking lights).

If it is head lights and car horn, it's a factory system.

Let me know which is yours.

A.