rugedraw, you nailed it. It took a full charge with the trickle charger and then the BMS reset. The sequence being accessory power only, Headlight toggles, and brake toggles to reset the BMS (and subsequently the blinking battery icon on the console). Thank you very much for the debugging help...
I'm at my wits end here and need some help too with my 2021 f150. I would deeply appreciate any advice or help. I've tried battery chargers, a new battery from my wife's Expedition, etc. I'm thinking my truck has issues with updates and in addition the Bluetooth is acting odd and disconnecting...