Changing alarm system
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=65447
Printed Date: May 15, 2025 at 12:06 AM
Topic: Changing alarm system
Posted By: colour
Subject: Changing alarm system
Date Posted: November 01, 2005 at 10:24 PM
Okay this is what I have I have an alarm already installed and I have figured out what wires are which. I am going to simply change to a different alarm and everything hooks up the same except for the door locks. On my old alarm there are six wires two unused (brown & white), two (purple) connected to ground, one (blue unlock common)and one (green lock common). Now on the new alarm I only have three wires one (green neg.lock, Pos. unlock)another (blue pos lock, neg. unlock)and a third (blue/red neg. 2nd unlock)
This is a negative lock, do I hook up the new (green neg. lock - pos. unlock) to the (blue unlock common)and the new (blue pos. lock - neg. unlock) to the old(green lock common)? And then leave the new (blue/red) unhooked? Thanks.
Replies:
Posted By: 05gt
Date Posted: November 01, 2005 at 10:27 PM
wouldn't it be the other way geen from the alarm brain to the old green, and the blue to the old blue cause on negative power locks the green is lock and the blue is unlock the blue/red is not needed
Posted By: colour
Date Posted: November 01, 2005 at 10:37 PM
Gee didn't even notice the colors were the same answered my own question if I would have read it!!. But what's the deal with the two purple wires on the old system being grounded?
Posted By: 05gt
Date Posted: November 01, 2005 at 10:40 PM
not 100% sure, someone else will have to answer that for you did you have actuators put in your car or does your car already have power door locks if your car has power door locks just get rid of all the old door lock wiring and connect the green wire to the lock wire in the car, and the blue wire to the unlock wire in the car
Posted By: colour
Date Posted: November 01, 2005 at 11:17 PM
It already has power locks.
Posted By: 05gt
Date Posted: November 01, 2005 at 11:21 PM
well do what i said one post ago, the last line of my post
Posted By: Hornshockey
Date Posted: November 01, 2005 at 11:24 PM
sounds like you have a relay pack similar to the DEI 451M installed; the two purple wires are a ground input for that relay pack. It basically allows a stronger ground signal to be sent to the lock wires than the hundred milliamps or so that the wires directly from the brain put out.
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Posted By: colour
Date Posted: November 01, 2005 at 11:41 PM
Yea I thought that the old alarm might have a built in relay. But will the new alarm work without the relay?
Posted By: 05gt
Date Posted: November 01, 2005 at 11:42 PM
yep it will, just do what was said
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