HYBRID 12V Battery Mystery SOLVED

[HeyBales]

2023 xlt

I'm getting some massive drawdowns after parking in my garage randomly. Not all the time, but it does happen. When I park I always turn off HVAC controls before turning off the vehicle. F11 is in and ATT service is excellent here.

You can see it on June 10th, 12th, and 13th. Without these massive drawdowns the battery would be great. My warranty runs out in Sept and apparently Ford will charge shop time to apply a fix (terrible customer service) so hopefully they figure it out before then.

No way I can recall everyone that has done what.
Were they willing to do the SSM updates for ACCM and ABS?
I know - you haven't had a battery drain - but perhaps that graph would be enough to show you got something that COULD have drained it, if it kept going.

That's encouraging to see it has the ability to charge it up so well with so few/short trips at least to cause a recovery, still not great something is causing that hard of a hit on a regular basis.

Also - do you have any truck settings enabled to look for updates?
We ain't getting any.

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[inline_five]

Pull fuse 11 and repeat.
Post what happens or doesn't happen.

Was thinking the same thing, but in my previous tests with it, I got zero drawdown with the fuse in.

 

[inline_five]

No way I can recall everyone that has done what.
Were they willing to do the SSM updates for ACCM and ABS?
I know - you haven't had a battery drain - but perhaps that graph would be enough to show you got something that COULD have drained it, if it kept going.

That's encouraging to see it has the ability to charge it up so well with so few/short trips at least to cause a recovery, still not great something is causing that hard of a hit on a regular basis.

Also - do you have any truck settings enabled to look for updates?
We ain't getting any.

I haven't actually gotten the ABS and ACCM updates yet, was on my list of things to do. But at least we have a baseline now, I will try to get to it over the next week or two.

I'm still on my original FLA battery from Sept 2023, but I do keep in on a NOCO if not using the vehicle for a week or so. I think June 7th was the last day on the charger in that pic. If I didn't have those random drawdowns the battery would be at like 12.5-12.6v the entire time, which is still healthy, but those drawdowns are killing it.

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