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relay control through door trigger

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=117794
Printed Date: May 17, 2025 at 1:33 PM


Topic: relay control through door trigger

Posted By: rtm038
Subject: relay control through door trigger
Date Posted: November 17, 2009 at 7:09 AM

I'm working on a 2006 Expedition with factory keyless entry.  Is there a way to wire a relay, using the door triggers (door ajar signal wires) as inputs, so that if someone opens a door, the relay energizes?  On the factory system, there 5 door ajar inputs that go from the doors to the VSM and each door rests at ground when closed.

Thanks
Ryan




Replies:

Posted By: 96hawkcnvt
Date Posted: November 17, 2009 at 5:33 PM
You should be able to do this with 2 relays. The one relay would be energized whenever the door is closed & the other would energize whenever the door is opened. See the diagram below.

posted_image

Hope that helps.

Todd

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Posted By: howie ll
Date Posted: November 18, 2009 at 2:34 AM
DEI also market a module to give a (normal) neg signal when the door opens, also on some DEI systems you can configure the unit to recognise this. I beklieve only Ford uses this back to front system where the door triggers go to ground on closing and open circuit on opening.


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