AT END OF IDLE HOLIDAY PERIOD, A MAINTENANCE FOREMAN & ELECTRICIAN ENETERED MINE TO START MAIN FAN. SMOKE WAS OBSERVED IN SHOP AREA AND THEY EVACUATED MINE. MINE RESCUE TEAM ENTERED MINE AND F OUND REMAINS OF GOLF CART WITH A FEW SMOLDERING EMBERS. AREA WAS MADE SECURE. NOT KNOWN WHEN CART BURNT OF LENGTH OF TIME. AREA MADE SECURE. FELT SALT CAUSED CORRODED WIRING, LEADING TO FIRE.