2025 Battery Issues

[Jack M.]

My batteries also failed at just over 3k miles. Way back in the day when sears was a thing and diehard was a decent battery johnson controls used to make their batteries. A google search appears to confirm my suspicion that very few companies actually make batteries nowadays and it's a crap shoot what you actually get.

 

[TheJRC]

Update for all, I have NOT had any issues with the battery or starting the truck after it sits for two days, since getting the firmware update from Dodge back when my last comment was posted.

I still have hot phone (iPhone 17) when charging using the charge pads under the screen.

No idea if that’s ever gonna be fixed but it helps keep the phone alive on long trips.

In case I didn’t indicate…. It’s a 2025 Laramie with 9 K miles.

 

[MotorcycleBoy]

JRC, on my previous truck (ltd 2022), the smartphone battery got very hot, and the same thing happens on this new one.
I think it's normal but to preserve battery, I take out the phone from the slot when it is 80 per cent of charge.

Inviato dal mio SM-F766B utilizzando Tapatalk

 

[nekit]

Add one more to this list. I’ve had my 2025 Bighorn with Hurricane motor since mid May, 5,000 miles. It worked great with no problems until five weeks ago. Was out and made a stop for about 15 minutes and it wouldn’t restart. Battery was dead. I charged the battery up and took it for a ride and the voltage seemed to be jumping all over from 12 to 14.4 volts. I took it to the dealer and they had it for two days. They said they had it fixed and it was a programming problem. Went to leave the dealer and Voltage showed 15.8 V and check engine light came on as I pulled out of the dealer lot. They had it for another three weeks said they replaced the auxiliary battery, reprogrammed the truck eight times and said the fuse array between the two batteries had blown the fuse. This is where it gets interesting. They said RAM said they aren’t covering the fuse array under warranty and I would have to pay $275 for it to be replaced. They said that ram says people are incorrectly, jumping the truck and that’s what’s making the fuse go out. I said BS I’ve never jumped the truck only charged it. After a bunch of pushback, they finally agreed not to charge me. I took the truck home on the drive home seemed fine. The next day went to start the truck and it barely started. Drove at 60 miles and the whole way the voltage said 15.8 V When I got to where I was going I shut it off and tried to restart it and the battery was dead. Showed 10 V. Put a charger on it and charge the battery up all day and drove it back to the dealer. After being without a truck for four weeks the dealer kept saying they didn’t have a loaner, but finally gave me one. Now they’ve had it for another week and I still don’t think they figured out anything. They said the fuse array is blown again. This is my work truck and we have a fleet of rams, but I don’t think we’ll be buying anymore. It’s too bad. I really liked this truck.

Update: After 7weeks at the dealership and Stellantis factory techs getting involved. Hopefully it's fixed. They ended up replacing the BCM, in the paperwork it talks about replacing the PCM also, but I can't find any parts on the paperwork for that. Replaced both batteries and the 150A fuse array.

 

[Peterhenric]

Update: After 7weeks at the dealership and Stellantis factory techs getting involved. Hopefully it's fixed. They ended up replacing the BCM, in the paperwork it talks about replacing the PCM also, but I can't find any parts on the paperwork for that. Replaced both batteries and the 150A fuse array.

The BCM is a computer. Accordingly, it ca be replaced of the hardware itself is faulty but it can be re-flashed with current or updated software. I had the BCM re-flashed on my truck just a couple weeks ago.

 

[tech97elec]

Odd occurrence for me -
2025 Big Horn, 14000 miles on the odo.
My primary and secondary batteries were replaced around 10,000 miles.

Went shopping this morning, no issues.
Came back home, 30 minutes later, opened the door, and no lights came on - dead as a doornail. No lights, or sign of life.
Got my key and tried to restart.
it did restart.
All seems normal as of now. The voltmeter on the truck showed 12.5 to 13.7 V

not sure what the heck is going on.

Very strange because the 12 volt battery under the hood is for starting w key and the 48 volt battery behind seat is for the auto start only, thinking you have a E tourque? So, not sure how it started at all.

When my battery was dead many times there were no lights, no ignition, nothing... wouldn't start or make a sound.

These trucks have issues and there has to be a common problem that is causing this to happen. All my issues were overnight, not within 30 minutes. Make sure you carry long jumper cables and a jump pack. My battery was so dead that jump pack wouldnt turn it over much till I jumped it with cables connected to my 13 year old Nissan van. Go figure