TL*THE CONTACT OWNS A 2003 BUICK RENDEZVOUS. THE CONTACT STATED THAT WHILE DRIVING 65 MPH WITH THE AIR CONDITIONER ON, THERE WAS A BURNING ODOR AND THE INSTRUMENT PANEL BEGAN EMITTING SMOKE. THE CONTACT OPENED THE INSTRUMENT PANEL AND REMOVED THE CONTROL BOX. THE CONTACT THEN NOTICED WIRES MELTING INSIDE THE BOX WHICH STOPPED THE AIR CONDITIONER FAN FROM RUNNING. THE VEHICLE HAD NOT BEEN INSPECTED OR REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 160,000.