I cranked the s250 this morning, moved it to reattach. Shut it down to hook up fittings from implement.... and now it will not crank. I checked codes. It says none. It goes through the normal sequence but when you press start, it does nothing. I replaced the battery with a new one, thinking it acted liked it was not getting a good connection. I cleaned the terminals and installed a new battery. Voltage on both batteries was 12.4. Still will not jump off from my truck. It has to be something simple that I am overlooking????