Doors Keep Unlocking Themselves

Danweis1

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Hi everyone. Searched the forums and could t find anything like this exactly. 2016 Ram Big Horn. After my doors lock automatically, all the doors randomly or not so randomly unlock themselves at the same time. When this happens it’s almost always on a left turn/curve or when I hit a medium bump. After they unlock, I can hear the mechanism constantly trying to unlock them again. If I lock them manually, they again unlock at one of the aforementioned situations or lots of times after an unlock. I swear I can hear a clicking in the drivers door or nearby while this is happening. I’ve turned off autolock and it does‘t change the behavior if I lock the doors manually; they still unlock themselves. Doesn’t seem to be speed related as it can happen from 17-50+ mph. When it first started I thought it was related to a passenger being in the truck, but it soon progressed beyond that and now happens if I’m alone or not. It’s progressively getting worse.
Any ideas or suggestions would be appreciated.

Thanks
 

Jeepwalker

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I would probably concentrate my efforts on 3 areas:

1) Battery & terminals (grounds too). How good is the battery and the terminals (clean)? Is the ground good. Even if your battery is 'good', what is the voltage? Is it on it's way out. What is the alternator putting out? On my H3, the battery is on it's way out. It's so-so good, but not great. When the battery gets low, guess what the first thing that becomes flaky is? The door switch module. It acts wierd. The fix is to let the vehicle sit (with cables unhooked and tied together) ...and remove the module and let the door module sit in the house overnight. Then it's good again for many months. The module itself on my H3 pries up really easy ...like a 30 second process to remove it w/o having to remove the door panel.

2) Door window/lock module. Usually part of the door switch control mechanism. There's generally a whole control circuit board beneath the driver switch controls. I'm not 100% sure on the rams, but that's how it works for most vehicles these days. If it were not getting a good electrical signal (like bad battery connection) that could do it. Or maybe the module is failing?? The dealer probably has some knowledge on this. But as I mentioned above, if your battery is getting low or the cable connections (or ground's) are weak, clean them. They could be part of the problem.

3) Broken wires at the door jamb. After so many open/close cycles the wiring between the body and the door can crack (the plastic jacket), and fray/break. Just a few weeks ago I was trying to sort out some issues with my Jetta door wiring. Of the 20 wires in my driver's door harness that go to the body, ALL of them had crackedd plastic, and 2 were broken and frayed. I knew there was a problem bc sometimes the door switch lights would stay on, and/or the trunk unlock wouldn't work. There were other funky things happening when wires were touching.

Those are the things which come to mind. You 'could' try unhooking the battery cables overnight, and remove the module and see if that makes any difference. Doesn't cost anything but a little time.

On my door switch module, I had two electrolytic capacitors which measured low ESR and needed replacing. Replacing them solved the problems I was having a long time ago, but i've been limping along since last spring on a weak battery. I'll be replacing it soon bc it won't carry me through the winter.
 
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Socalramfan

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Only (2) things stick out in my mind that can actually control ‘all’ the door locks.

1. Your key fob,
2. Drivers side Master door switch.

Id be looking at those two sources and track it from there :waytogo:

My personal thought……. It’s at the Master switch connection. Unplug it, reset it and adddtess it from there. Worse case…. You’ll have to buy a new switch.
 

GTyankee

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Open & Inspect your FOB
clean all dirt on & around the Green Circuit Board
check the inside of the side of the FOB that have the buttons on the outside, you will see electronic contacts, they may have fallen off

There are more YouTube videos about cleaning FOBs than you could watch in a half day
 
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Danweis1

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Only (2) things stick out in my mind that can actually control ‘all’ the door locks.

1. Your key fob,
2. Drivers side Master door switch.

Id be looking at those two sources and track it from there :waytogo:

My personal thought……. It’s at the Master switch connection. Unplug it, reset it and adddtess it from there. Worse case…. You’ll have to buy a new switch.
You sir, are a genius. It appears it was indeed the key fob. Using my spare key fob, I took a 10 mile trip today and not a single ‘unlock’ occurrence happened. I realize a short trip may not absolutely prove anything, but. I would have never in a million years thought the key fob could have been involved. Thank you so much!
 
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Danweis1

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Open & Inspect your FOB
clean all dirt on & around the Green Circuit Board
check the inside of the side of the FOB that have the buttons on the outside, you will see electronic contacts, they may have fallen off

There are more YouTube videos about cleaning FOBs than you could watch in a half day
Thank you also. It turns out it was indeed the key fob. See my response above. Thanks!
 

Socalramfan

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You sir, are a genius. It appears it was indeed the key fob. Using my spare key fob, I took a 10 mile trip today and not a single ‘unlock’ occurrence happened. I realize a short trip may not absolutely prove anything, but. I would have never in a million years thought the key fob could have been involved. Thank you so much!

Awsome….. hopefully it’s solved :waytogo:
 

EdGs

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My fob did almost the same thing, except not while in motion. I had went to the grocery store and as I was walking away, my truck started beeping repeatedly as if being locked really fast.

The little contact button in the fob had broken and moved just enough to create the havoc. It was so sensitive, you could run your finger over the fob and it would beep.

Ordered a replacement in amazon, cleaned the circuit board, swapped the rubber, and all is good.

Probably happens from dropping keys more than anything else.
 
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