2012 dodge ram 3500 door lock issue
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=134412
Printed Date: July 19, 2025 at 5:15 PM
Topic: 2012 dodge ram 3500 door lock issue
Posted By: robd007
Subject: 2012 dodge ram 3500 door lock issue
Date Posted: June 21, 2013 at 12:15 PM
I have a Ram that I installed an APS 25C in about a year ago. The issue I am having is that if the alarm is set before the doors are all closed, the locks will not unlock. They will not unlock with the alarm remote or the door lock switch. If all doors are closed and the alarm is set the locks work fine. I tried disconnecting the dome supervision wire but had the same result. Has anyone had this issue, or have any idea what may cause this. Thanks for any info.
Replies:
Posted By: i am an idiot
Date Posted: June 21, 2013 at 5:50 PM
Where and what color wires did you catch for Door lock? Did you use resistors? If so, what values?
Posted By: howie ll
Date Posted: June 21, 2013 at 11:30 PM
Why would you set the alarm BEFORE you shut the door?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: robd007
Date Posted: June 22, 2013 at 11:56 AM
I used the purple and light green with a 330 ohm resistor on the lock and 100 ohm on the unlock and as far as setting the alarm before the doors were closed the customer accidentally did it. He knows now to be careful about it but it seems strange that no lock or unlock functions would work even using the door switch.
Posted By: lucasoil4u
Date Posted: July 02, 2013 at 2:21 PM
did you use relays and diodes?
Posted By: robd007
Date Posted: July 02, 2013 at 3:27 PM
I did use relays but no diodes that could be my issue where would I place the diodes.
Posted By: pts760
Date Posted: July 04, 2013 at 7:21 PM
place the diodes inline with the unlock/lock wires coming from your relays to the purple light green vehicle unlock/lock wire. Here's a diagram:
 ------------- I drink current, eat ohms, and bleed voltage
Posted By: robd007
Date Posted: July 04, 2013 at 7:28 PM
Thanks for the help I will install the diodes. Thanks for the illustration.
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