I recently purchased a 2012 ford explorer, and one of the first things that I did was change the battery. After removing the old battery I left the car overnight before installing the new battery. After installing the new battery everything works except for the radio and the display screens. I have tried the flashing high beams/brakes to reset battery, removing and reconnecting wires to battery terminals, locking door and closing it, and testing the fuses. When I remove the fuse or the battery cables and reconnect the battery turns on momentarily followed by a loss of power a minute later. I tried updating the software using a flash drive with the newest upgrade on it, but that doesn’t work since there is no power to the usb ports or cigarette lighters. The ford website says that I do need an update when I plug in my vin. Any suggestions? The ford dealer can’t get me in for another month. Any advice is appreciated, thank you very much!