We have a 1997 Discovery motorhome with 5.9 Cummins and an Allison MD3060 six speed transmission on a Freightliner chassis. Yesterday we loaded up the motorhome and was backing up to hook up a trailer. The transmission went into neutral and the shift panel display for the Allison went blank. The engine and all other electrial systems continued to work. I pulled the parking brake. I shut the engine off. Then I could not restart. I checked all the fuses I could find. I even opened the cover to the VIM and verified those fuses. I measure 12.4 V on the Ignition fuse and 3.4 V on the ECU power fuses inside the VIM. Is this normal? What else can I check?