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. REPLACED SWITCH AND WIRE ATTACHED TO TERMINAL NR 1 ON SWITCH FOR THE WING ILLUMINATION LIGHTS IAW MM.