2000 sunfire, alarm goes off after 20mins
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=11717
Printed Date: July 19, 2025 at 9:05 PM
Topic: 2000 sunfire, alarm goes off after 20mins
Posted By: Duston
Subject: 2000 sunfire, alarm goes off after 20mins
Date Posted: April 01, 2003 at 2:05 PM
Hello i've been putting alarms in for a little while and starters also. Have'nt had this problem before though. Installed a Ultra Start 2250 TL , alarm/starter everything works- alarm, starts fine etc., but when the car is armed 20 mintues later it goes off, every time i have to press lock then the start button to bypass the senors so it don't go off, and at 20 mintues it chirps two times but does'nt go off. Any help? think it might have something to do with the radio because this radios stay on until you open the door!!!!! so when i arm it i think it is senceing someone is opeing the door... ------------- Factory security systems suck!
Replies:
Posted By: auex
Date Posted: April 01, 2003 at 5:33 PM
Did you diode isolate the doors or did you tag a domelight wire? If the alarm has a voltage sensing option then this could also cause this, the bcm shuts down after 20 minutes and the voltage changes setting off the alarm.
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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: Duston
Date Posted: April 01, 2003 at 5:46 PM
i just taped into the door pin, two wires found behind the switch..only one wire i taped into with the alarm pos. input door... thanks post again with any other ides..
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Factory security systems suck!
Posted By: auex
Date Posted: April 01, 2003 at 7:31 PM
Two things, there are two door triggers and they are negative, and they must be isolated with diodes. They are grn/blk(drivers door) & lt. blue(passenger doors) and will be at the pin switches. Switch your door triggers and your problem should be solved.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: djfearny2
Date Posted: April 01, 2003 at 9:09 PM
the trigger are negative and can be found at the kick pannel of each side read isolation section and diode isolate wires,. and like auex said your problem should be gone.
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Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.
Posted By: Duston
Date Posted: April 02, 2003 at 8:02 AM
ok guys i will try this method i think i had the right input from my alarm neg. door input, i think i typed pos. thanks again.
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Factory security systems suck!
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