No crank at all? Believe it or not, I had something sort of similar happen to me. I was driving home from work all normal and the car just shut off. It would not crank or even prime the fuel pump. Turns out the radio resistor went bad and blew the fuse. The fuse that it was on also controlled almost everything: fuel pump, injectors, starter, etc. Check all your fuses first. They can be the cause of strange things. Unfortunately electrical troubles are hard to troubleshoot. Fuses don't blow for no reason.