What was found
ON DESCENT A STRONG ELECTRICAL ODOR COMING OUT OF GASPERS. ELECTRICAL SMOKE OR FIRE CHECK LIST INITIATED. AFTER ITEM NR 6, SMOKE STOPPED. AIRCRAFT REMAINED IN THIS CONFIGURATION AND LANDED. C/A: FOUND MELTED INSULATION AT WING ILLUMINATION LIGHT SWITCH TERMINAL. LIGHT INTERMITTENTLY INOPERATIVE, PULLED CIRCUIT BREAKER. TRANSFERRED TO DMI, MEL. REPLACED SWITCH AND WIRE ATTACHED TO TERMINAL NR1 ON SWITCH FOR THE WING ILLUMINATION LIGHTS IAW MM.