WHILE DRIVING AT 70 M.P.H. ON AN INTERSTATE HIGHWAY, CRUISE CONTROL WAS DISENGAGED USING BRAKE PEDAL FOLLOWED BY TOTAL ELECTRICAL FAILURE. LIGHT RAIN WAS PRESENT AND CAR BEGAN TO SPIN MOVING TO THE SIDE OF THE ROAD UNCONTROLLED, ROLLED AT LEAST ONCE AND FLIPPED END OVER END. DRIVER WAS 7 MOS. PREGNANT.THIS SAME TYPE FAILURE WAS EXPERIENCED TWICE BEFORE, TAKEN TO THE DEALER AND CAUSE OR DUPLICATION NEVER WAS DISCOVERED UNTIL THE INCIDENT. PREVIOUS OCCURENCE WAS O/A 10/98