Disable a non-factory installed alarm?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=58865
Printed Date: April 26, 2024 at 12:16 AM

Topic: Disable a non-factory installed alarm?

Posted By: gorgonzatron
Subject: Disable a non-factory installed alarm?
Date Posted: July 05, 2005 at 10:59 AM

My GF bought this 1999 nissan 200sx used about 4 years ago (with no manual or instructions)

The previous owner installed an UNKNOWN alarm/locking system (w/ remote) which has been nothing but a pain in the arse. Today, the car will not even start, and a AAA-sent mechanic advised (after poking around) that it was a problem due to the alarm. The lights turn on/etc., but the ingnition wont crank. Now the battery is dead, but that is small problem.

I have found the following 3 devices under the steering column:

- a "kill switch" or "bypass" toggle which never worked anyway, so i dont know if it's relative.

-an AUDIOVOX shock sensor, model number AS9492 (I found the owner manual here (.pdf): www.audiovox.com/manuals/installation/1285042_IM.pdf

-something that says 'nissan tridon" and some numbers: 23731, 1M200. this I can not find any info for.

IS THERE ANYTHING I CAN DO MYSELF, BEING RELATIVELY COMPETENT AND BROKE?? To:
A) get the car started
b) DISABLE this monster for good

THANK YOU VERY MUCH!!!!!

Replies:

Posted By: ccroadshop99031
Date Posted: July 05, 2005 at 11:15 AM

look for the brain under the dash and pull ou the fuse or look for a small guage wore running from the batt and pull that fuse

Posted By: Powermyster
Date Posted: July 05, 2005 at 11:23 AM

that won't do the immobiliser though. find the brain is the first step

Posted By: Rivulent
Date Posted: July 05, 2005 at 4:08 PM

If the alarm has a starter kill, then simply pulling the fuse will cause the car to start up with no problem, since they (should) be actuated by a ground-when-armed wire.

Posted By: joe_1
Date Posted: July 05, 2005 at 5:14 PM

look at the moduel and see where the wirrs go to any of the igntion or starter wires when you find these it should be 2 wires coming from the alarm one end goes to the switch side and the other goes to wire side when you find these cut them and join them back up if there is a 2 point imob you will have to find both circuits

Posted By: infoaudio01
Date Posted: July 06, 2005 at 12:20 AM

Rivulent wrote:

If the alarm has a starter kill, then simply pulling the fuse will cause the car to start up with no problem, since they (should) be actuated by a ground-when-armed wire.

Assuming the starter kill relay was wired in a normally closed circuit. After finding the main fuse on the brain, or disconnecting the main harness, and if your vehicle still wont start after a good jump on the dead battery, then it may be possible that it was wired in a normally open circuit.