As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT A STRONG ELECTRICAL ODOR COMING OUT OF GASPERS. ELECTRICAL SMOKE OR FIRE CHECK LIST INITIATED. AFTER NR 6, SMOKE STOPPED. AIRCRAFT IN THIS CONFIGURATION AND LANDED. FOUND MELTED INSULATION AT WING ILLUMINATION LIGHT SWITCH TERMINAL. LIGHT INTERMITTENTLY INOPERATIVE. PULLED CIRCUIT BREAKER. REPLACED SWITCH AND WIRE ATTACHED TO TERMINAL NR 1 ON SWITCH FOR THE WING ILLUMINATION LIGHTS.