Do you mean it will not crank the engine or do you mean it will not fire when cranking with the key
YOU LIKELY HAVE tripped the awful, the hateful SEAT BELT INTERLOCK
Look under the hood on the driver side apron for a box like a horn relay with a PUSH BUTTON reset button. See if that "fixes" it. THEN find the two "yellowish" wires in that connector and splice them permanently together