ELECTRICAL MALFUNCTION?

HAVE ROVER 45,I WAS DRIVING WHEN IT WAS RAINING.AT A SPOT THE ENGINE TURNED OFF.I NOTICED LATER THERE ISNT POWER SUPPLY TO STARTER-PLUGS.SOMETIMES POWER COMES BACK AND OFF AND THE MAIN POWER RELAY FUSE SORT OF HAVE PERMANENT POWER WHEN EVEN IGNITION IS OFF,SPEEDOMETRE RISES AND FALLS ABNORMALLY WHILE THERE ISNT MOTION,COOLING FAN TO RADIOTOR STARTS WHEN MASS IS GIVEN TO MAIN RELAY FUSE.MY ENGINE DOESN'T START NOW. HELP! I APPRECIATE IN ADVANCE