WHILE DRIVING ABOUT 25 MPH, ALL OF SUDDEN WINDSHIELD WIPERS ACTIVATED AND SMOKE STARTED COMING FROM DASHBROAD. SMOKE FOGGED UP ALL WINDOWS, CAUSING POOR DRIVER VISIBILITY. DRIVER QUCKLY PULLED INTO AN AUTOMOTIVE SHOP. A MECHANIC DISCONNECTED THE BATTERY. MECHANIC FOUND ALL THREE WIRING HARNESS WERE MELTED TOGETHER. REPAIRS TO VEHICLE THROUGH STATE FARM INSURANCE. *AK