Originally Posted by copernicium112
Unfortunately I think your only options at this point are fuse pulls (I don't know the fuse #(s) for Sync but someone here does I'm sure), battery disconnect, or a trip to the dealer.
The owner's manual says it's fuse #67 for SYNC, which is in the passenger compartment fuse panel. I would go ahead and pull #79 also, it's for several items including the radio.
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