Check electronic limited slip differential error message that pops up on the speedometer. The message appears on the GPS stating to safe battery auto is powering down. Driving down highway 75 miles a hour and my expedition decides to power down to save the battery. Has anyone seen anything like this? stuck outon the road very concern to continue to drive. I stopped into ford showed them the pictures. Nothing in the log indicate issue. Alternator is good. Battery is good. First message was for the slip differential. next auto powers down to safe the battery while driving down the highway at 75 miles an hour plus we are towing our travel trailer. The battery is good.