2010 pilot with new alternator, starts perfectly, drive till operating temp, or even let idle till operating temp, turn off vehicle and remove key, put key back in and turn to start.......and all lights on gauges, all power to everything, dead. Nothing, no power to anything. Opened hood, tested battery for voltage, 12.5v. Wait 30min-1hr and itll start right up. I noticed when no power, the red security light was still flashing tho, and i show 12.5v at the battery, but just nothing has power. Then try after a while and like nothin ever happened. What could it be after checking/cleaning the battery terminals and battery tested showing good, i just cant figure it out.