Weird Charging Issue -- Possibly after module replacement

[AntJohn73]

I am figuring that this is exactly what my truck needs.

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[Mpi]

My dealer has confirmed a full balancing is needed. The service rep told me the original instructions from Ford were to balance the new module to match the battery. Now Ford tells them a more involved balancing is needed where each module, new and old, will be balanced and the voltage set to some common level before reinstallation. I'm not sure how accurate all that is, but it's what I'm told.

So such a condition as we've been discussing does exist, and it won't necessarily throw a wrench light or brick the truck. If you are aware enough of your vehicle this should be a good thing.

Another update: in the process of balancing they found that one of the replacement modules was bad.

So it seems that in fact even a bad module might not throw a yellow wrench! It still seems like a good thing that the truck remains driveable, but you'd think there should at least be an indicator light for a bad module.

 

[GoodSam]

in the process of balancing they found that one of the replacement modules was bad.

How many replacement modules did you have done for the Safety Recall 25S18 back in October, 2025? And, just to confirm, one of those new modules put in went bad? Yipes!

 

[Mpi]

How many replacement modules did you have done for the Safety Recall 25S18 back in October, 2025? And, just to confirm, one of those new modules put in went bad? Yipes!

I need to clarify with the dealer whether the bad module is the new one. Looking at my charge history, I suspected is was bad out of the box because it 'falsely' charged to 100% the first time the dealer charged it.

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