ELECTRICAL FUILURE

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MY CAR IGINATION LIGHTS AND MOTOR JUST DIES AND RESTARTS ON ITS ON. I AM DRIVING DOWN THE ROAD AND THE MOTOR STOPS,TACK DROPS TO ZERO AND LIGHTS GO OFF! THE CAR WILL RESTART AND GO WHILE GOING DOWN THE ROAD AFTER ABOUT 1/2 SECOND. IT'S AS IF YOU TURN THE KEY OFF AND BACK ON BUT YOU DON'T. CAN YOU HELP