S-10 Blazer Factroy 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=56471
Printed Date: May 01, 2025 at 6:19 PM
Topic: S-10 Blazer Factroy Alarm
Posted By: Memphisman
Subject: S-10 Blazer Factroy Alarm
Date Posted: May 26, 2005 at 7:22 AM
I installed a Crimestopper RS840 in a 2000 S-10 Blazer and I'm having trouble with disarming the factory alarm. It will disarm it for remote starting but not for unlocking the doors. Is there any way to set this unit up so it will disarm the factory alarm before it unlocks the doors?
Replies:
Posted By: sparkie
Date Posted: May 26, 2005 at 3:24 PM
The disarm wire for the factory alarm is in the BCM's purple plug located under the center dash to the right of the gas pedal. Use a negative pulse to disarm the alarm. If your unit doesn't have a dedicated disarm wire, then split the unlock circuit into two. Use these leads to send a positive pulse to the unlock wire in the truck and a negative pulse to the disarm wire. You will need a relay.
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sparky
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