Welcome. Go have your trk battery load tested most last 2-3 years. If batt is going out and voltage drops trk might think it is being tampered with and sound alarm.

 

I had a F150 that did that... the truck thought the rear door was opened (it was not). Faulty sensor. Would go off randomly. Annoying.

 

Please clarify what you mean by "a little while later". Is that a few seconds, minutes or what? Is it always the same time after locking the truck? Does it always happen?

I would disconnect the negative battery cable for a half hour to get all the truck modules to reset. Then, I would go around and open and solidly close all doors and the hood to make sure one of them isn't slightly ajar.

 

As far as timing, i've never timed it, but its about enough time for a person to park it and walk inside a store or my house, so I'm guessing a minute or two? And it doesn't happen all the time its pretty random. I have disconnected the battery for several hours while doing something else and it hasn't changed anything. I will check the doors, hood, and load test the battery.

 

Any chance it happens most often when it is damp outside. Like very humid or during a rain?

 

last time it happened it was dry and warm

 

Well, that is all I have. Reason I asked about humidity and rain is that my Wifes cobalt had a similar problem a couple times. Never found out for sure what the cause was, but it always happened when it was very wet and humid outside or raining. Damn thing would go off in the middle of the night. I would reset it and a 15 minute or so later it would go again. I thought maybe some neighbor kids were playing games so I sat in the damn car until it went off again. I finally had to disable the alarm and leave the car unlocked. Next day, it was fine, until a couple months later.

 

You need to look at what triggered the content theft event. Typically doors or the hood. You need a dealer type scan tool to get this info. Seen 1-2 with water leaks in rear doors but variables are endless.

 

So there is a record of what sets off the alarm everytime?

 

Where would a person get access to a dealer type scan tool? Would oreilly's tool have the capability?

 

Probably not but I have been wrong before. You need access to the BCM theft data. Most scan tools that can do that are well north of 1000$.