What was found
(CAN) DURING THE FLIGHT, THE FLIGHT CREW NOTED A BURNING SMELL IN THE COCKPIT FOLLOWED BY A "LEFT WINDSHIELD HOT" CAUTION LIGHT. SHORTLY THEREAFTER, SMOKE APPEARED IN THE COCKPIT. THE CREW SELECTED THE WINDSHIELD HEATERS OFF AND THE AIRCRAFT DIVERTED TO THE NEAREST AIRPORT.MAINTENANCE FOUND THE LEFT WINDSHIELD HEATER LEAD CONNECTION AT TERMINAL L2 (ON THE WINDSHIELD) HAD OVERHATED AND BURNED. THE LEFT WINDSHIELD AND HEATER LEADS WERE REPLACED AND ALL FURTHER CHECKS WERE COMPLETED PRIOR TO RELEASING THE AIRCRAFT TO SERVICE.