TL*THE CONTACT OWNS A 2000 LINCOLN NAVIGATOR. WHILE DRIVING THE PASSENGER SMELLED A BURNING ODOR. UPON FURTHER INSPECTION HE NOTICED THAT THE WIRING HARNESS, MAIN TERMINAL, COMPRESSOR AND THE ALTERNATOR HAD MELTED. PRIOR TO THE FAILURE, HE HEARD A PECULIAR NOISE. THE VEHICLE WAS NOT TAKEN TO THE DEALER NOR HAS HE NOTIFIED THE MANUFACTURER. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 169,000.