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volvo 740 how to implement trunk unlock

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=121356
Printed Date: May 28, 2024 at 9:01 PM


Topic: volvo 740 how to implement trunk unlock

Posted By: cartman_sr
Subject: volvo 740 how to implement trunk unlock
Date Posted: April 15, 2010 at 10:09 AM

Hey. I have one last thing to set up on my Omega Rec-12 keyless entry system and it's the trunk unlock function it has. The problem is with the way the car works: Normally, you unlock all the doors and the trunk by using the key in the driver's side door. Everything unlocks. And the trunk has a button you push to open it so you normally don't even need the key to pop it open, unless all the doors are locked.

Well for the Rec-12 I had to install a driver's side door lock motor (got that all working, with junkyard parts). So that's taken care of, and the remote works. But the problem is how to set up the trunk popper feature of the Rec-12? I had this idea to use a solenoid (I have a heavy duty one I bought a long time ago I can use) to basically pop the button from inside (I can see how to do it mechanically) with a cable, but the problem is the trunk needs to be unlocked for it to pop open. I thought of using a dei 528T with the BLACK/ stripe wire to pick up a negative pulse from the unlocking system then do a 1-second tug on the solenoid. Or I guess I could just connect the trunk output wire straight to the solenoid and then I just have to remember that the doors have to be unlocked before the trunk will open with the remote.

All the lock motors are 2-wire reversing polarity on the car. Any ideas? It's a 1991 Volvo 740.




Replies:

Posted By: howie ll
Date Posted: April 15, 2010 at 12:47 PM
Use the second method, better you should only be able to pop the trunk when the vehicle is unlocked anyway.




Posted By: t&t tech
Date Posted: April 15, 2010 at 7:07 PM
Yes X2 with howard, i did this on my own vehicle just recently, it is best to only be able to do it when the doors are unlocked!

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5




Posted By: howie ll
Date Posted: April 16, 2010 at 1:47 AM
I would also take issue with your sentence "the trunk needs to be unlocked for it to pop open".
That's untrue as a matter of fact, mine does, I'll bet you haven't even examined it with the trunk open, lock catch thrown over and seen what if anything opens it from the inside. If there's a key hole on the outside, it's do-able.





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