What was found
LAV EMERG LIGHT: EMER LIGHT UNDER LAV SEAT IS INTERMITTENT. AFTER FURTHER TROUBLE SHOOTING FOUND WIRING PINS TO BE SEVERELY CORRODED. REMOVED LIGHT ASSY FROM PANEL AND CLEANED OFF CORROSION FROM CONNECTOR. RE-INSTALLED LIGHT ASSY, OPS CHECK GOOD, WITH NO DEFECTS NOTED. ALL WORK PERFORMED PER CESSNA MODEL 680A IMM, 25-40-07.