sliding door power locks
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=107423
Printed Date: October 31, 2025 at 12:17 AM
Topic: sliding door power locks
Posted By: dbedard1st
Subject: sliding door power locks
Date Posted: September 14, 2008 at 8:02 AM
I'm adding power lock to a van sliding door.
I need the door to lock after it's closed if the lock button has been pressed while door is open.
Short of getting a module from the recycling yard, I'm looking for a latching relay circuit to do the same thing.
Replies:
Posted By: KPierson
Date Posted: September 14, 2008 at 9:57 AM
Does the sliding door of a dedicated pin switch?
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Kevin Pierson
Posted By: dbedard1st
Date Posted: September 14, 2008 at 7:27 PM
I will add what's needed to make this work!
Door switch, sliding door contacts, etc...
Posted By: KPierson
Date Posted: September 14, 2008 at 8:55 PM
If you could supply a dedicated door pin I could design a circuit to make it work. It seems like it would be pretty simple, but laying it out there is a lot to do. I'm thinking of something like this: If a (-) pulse is outputted to lock the door, but the door pin indicates the door is open the circuit will set a flag. The circuit will then continue to monitor the door pin and wait for it to drop out. Once it drops out the circuit will output a (-) signal for 0.8 seconds. If a (-) pulse is outputed to lock the door and the door pin shows the door is closed it will lock as normal (0.8 second pulse). Thoughts? ------------- Kevin Pierson
Posted By: dbedard1st
Date Posted: September 15, 2008 at 3:26 PM
I was thinking about using a latching relay and other relays if needed. But I don't really know how latching relays work and the locking pulse is positive while resting at ground while not used. There will be a door pin to ground when door open for the locks.
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DarPetSit.com
Posted By: KPierson
Date Posted: September 15, 2008 at 6:29 PM
I'm not sure how you would integrate a latching relay - perhaps you could have the relay latch if the lock button is pushed and the door is open, but you will still need some sort of control for timing the "lock" once the door is closed. If you are interested in my circuit I can build it and test it and ship it to you. All I would ask is that you pay for the actual cost of parts and shipping. This actually sounds like a fun Saturday project. ------------- Kevin Pierson
Posted By: Mike M2
Date Posted: September 15, 2008 at 9:31 PM
YOu don't mention year and model. I have done a few, mainly Caravans....
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Mike M2
Tech Manager
CS Dealer Services
Posted By: dbedard1st
Date Posted: September 16, 2008 at 3:00 PM
1987 Chevy Astro without factory power anything!!! ;-)
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DarPetSit.com
Posted By: Chris Luongo
Date Posted: September 16, 2008 at 4:17 PM
Another option that might work, depending on your budget:
1. Install aftermarket alarm system with keyless entry.
2. Program alarm for passive arming, passive locking.
3. After the last door of the van is closed (doesn't matter which), after 30 seconds, the doors will lock and the alarm will arm.
Posted By: dbedard1st
Date Posted: September 16, 2008 at 5:25 PM
Kevin
I'll most likely get the module from the recycling yard.
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DarPetSit.com
Posted By: dbedard1st
Date Posted: September 16, 2008 at 5:26 PM
Chris
I have an older Commando remote start alarm without his function I will install in this vehicle.
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DarPetSit.com
Posted By: KPierson
Date Posted: September 16, 2008 at 6:44 PM
Cool, no problem. just let me know if you change your mind. I should be able to build an "automotive grade" controller for under $10 (plus shipping). Either way, keep us updated. ------------- Kevin Pierson
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