Car Alarms: Valiant alarm, valet mode, dash area

Question
I have a 1994 Suburban.  Had it serviced for a short behind dash.  The shop did a lot of rewiring.  Now my truck led light for alarm is constantly on and it won't arm.  For example, shut doors press button on remote, doors will lock but when I open doors in "armed" mode, nothing happens..can even start truck.  When I shake truck, nothing alarms.  It's a Valiant model 1850a.  Any help would be appreciated.  Lou

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.

Good luck.

ALARMTEK