What was found
(CAN) AT START OF POST ENGINE START CHECKS, THE CREW NOTICED AN ELECTRICAL BURNING SMELL, FOLLOWED BY SMOKE FROM BEHIND THE COPILOT SEAT. ONCE THE ENGINES SHUTDOWN, DC POWER REMOVED AND THE PASSENGER DOOR OPENED THE SMOKE SUBSIDED. OVERHEAD BIN CONNECTOR HAD BECOME SEVERELY OVERHEATED (OVER SEAT 1CD). INVESTIGATION UNDERWAY AT DHI AND BRAD. ALSO WIRE P/N 1-640523-0.