Truck wont start. Please help!

[Texasram1]

2022 diesel mega cab

Parked it outside last night, and of course it rained a lot.
Started it this morning w/o issue, but only had to move it 10 feet.
Tried to start it maybe an hour ago, and no dice.
Said it was doing a diesel preheat. Then nothing but a loud pop/click through the stereo.
Tried a fully charged jump box and still no dice.

Here is a vid of trying to start it on jump box

Help!

 

[Texasram1]

Truck says V is 9.8

 

[johanh13]

9.8V is too low, is that with the jump box connected and activated?

 

[Texasram1]

$600 in new AGMs and she is back online

 

[Texasram1]

9.8V is too low, is that with the jump box connected and activated?

It was, yes

 

[Brutal_HO]

For future reference, you need to put the jump box on the engine block side of the IBS that's on the negative battery post.

If you try to jump directly to the battery post, the BCM/PCM doesn't know SOC of the battery/jump box and will not crank.

 

[Texasram1]

For future reference, you need to put the jump box on the engine block side of the IBS that's on the negative battery post.

If you try to jump directly to the battery post, the BCM/PCM doesn't know SOC of the battery/jump box and will not crank.

I dont follow. IBS on the negative battery post?

I put my jump box on the driver’s side battery. Red to red, blk to blk.
This has worked in the past, but certainly coulda been dumb luck.

 

[Trash Panda]

$600 in new AGMs and she is back online

Where in the hell did you pay 300 dollars per battery?

That is close to what I paid for both.

 

[Texasram1]

Oreiley’s. 259.99/ea. plus tax.

 

[Trash Panda]

Oreiley’s. 259.99/ea. plus tax.

Ouch.

Well, at least it fixed the no start for ya!

 

[Brutal_HO]

I dont follow. IBS on the negative battery post?

I put my jump box on the driver’s side battery. Red to red, blk to blk.
This has worked in the past, but certainly coulda been dumb luck.

Proper Battery Charging
In-Vehicle systems is not an issue. Please note to charge through the IBS or tie negative clamp to
Body/engine ground. Customers, Dealers, Mechanics, and Engineers usually want to place the
negative clamp on the pole of the battery. This creates Blind charging. “DO NOT BLIND CHARGE”
See below proper connections for charging.

Same goes for jumping.

Read this thread from the link to the end.

Post in thread 'Big electrical problem with my new 2025 3500'

Mar 26, 2026

Hello all…I am on the road with my 3500 dually with 1,100 miles on it and have a new problem!

The truck will not crank/start about half of the time. It acts like the batteries are dead but I know they aren’t as I keep them on a charger all night and have a volt meter. Plus sometimes it won’t crank/start after fueling up even after driving for hours. Other times it can sit all night and crank/start up fine. Also, sometimes if I cycle the push button ignition 3 or 4 times it will start up fine.

Here is the strange thing….if I connect a jump box it always cranks/starts! I swear it...

• Brutal_HO