Jlarbeypro
Active member
Thanks for all that. Ford is going to bench test the battery and see whats up. will replace for free within 3 years they stated.Check with your dealer for a warranty replacement. Don't tell them you were using ForScan.
If the old battery holds a charge and just died from being in accessory mode, they might deem it as still "good" and send you on your way.
It's worth a try though as it should be covered under your warranty if it doesn't hold a charge, assuming you are still in the bumper to bumper time/mileage.
If the the battery doesn't charge while your truck is "on" (not accessory mode), there may be other issues like a DC-DC converter problem, that warrants a service visit for sure.
Any different chemistry battery is generally not recommended based on what I've read here and the Mach-e forum due to the BMS not being made for the different charging and use curves.
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fair enough