Car Alarms: disarming the alarm, alarmtek, radiater

Question
I bought this vehicle 3rd hand.....it came at agood price with no remote..one key..the alarm has not worked for three weeks & all of a sudden the alarm goes off if any door other than the drivers door is opened.... is there a fuse that can be pulled? Have tryed pulling horn plugs...the largest is in front of the radiater...not easily gotten to..please help!

Answer
Make, model & year of the vehicle?

Please be more descriptive if possible.

"GOING OFF?"

I need to determine whether it's a factory alarm
issue or, if it's an aftermarket system you are
dealing with.

Is it: Headlights flashing, car horn honking
and a worded SECURITY" light in the dash flashing?
(doubtfull since none of the notes show this
car as having a factory alarm system)=FACTORY

Or,

is it: flashing parking lights,
an LED in the dash area, and a siren
going off?= AFTER MARKET

Let me know more on this to better
advise you on a course of action
to take.

Best Regards,

Robert Martin
CEO/ALARMTEK
CARALARMMAN.com