This morning, drove my 2014 wrangler unlimited rubicon to work to drop off some stuff before I went to a early meeting across town. Put it in park, left it running, and got out to unload a couple things when suddenly,
The horn blared loudly and continuously. I thought WTF and I grabbed the key and turned off the engine. Tried door lock and unlock and alarm buttons, no change, continuous horn like a stuck horn button. Banged on horn center with no effect. Unlocked building and set some things inside and locked building and got back in jeep.
Started and ran normally with horn blaring. Was going to take it to the dealer instead of going to my meeting and it stopped, just the horn, jeep ran fine.
So I drove it to my meeting, parked and locked it. When I came out 45 minutes later and used the key fob to unlock, sure enough, instant continuous blaring horn. I started it up and drove out of the parking lot and 1/2 block before it quit. I drove home to get other key fob and it went off when I opened the unlocked door. Loud for a minute or 2 then normal in every way.
EXCEPT when I go onscreen to the HDD system information it displays database: ERROR- TAG NOT FOUND
So I drive it to Oreillys because the dealer can't get it in until next Wednesday and I thought maybe, just maybe, the battery is failing and throwing some weird voltages or something. The sales slash tech guy listened to me explain my issue for 5 minutes and didn't think my 5 year old battery could cause that and didn't seem to want to be bothered to test my battery. So I told him I would check it myself tonight. Walked out and opened the door and.... Silence.
Started and ran normal. We will see when I go to leave later. I'm leaning toward a hiccup in the system voltage or something and possibly the battery getting ready to die.
Had an issue with our crossfire a couple years ago where it started locking the doors while parked in the garage then started setting off car alarm at random times. The dealership had it for 4 days and couldn't find the problem even though it did it on their lot a couple times. I took it home and 3 days later the battery was dead. Put a new battery in and never had the problem again.