What was found
NOSE GEAR UNSAFE LIGHT. : DURING GEAR EXTENSION, CREW OBSERVED THE NLG INITIALLY EXTENDED NORMALLY & DISPLAYED A GEAR UNSAFE INDICATION. CREW COMPLETED CHECKLIST & DIVERTED TO KLIT. PRIOR TO LANDING, CREW MANUALLY EXTENDED MLG, RECEIVING 3 GREEN/DOWN & LOCKED INDS, DECLARED AN EMERGENCY. UNEVENTFUL LANDING, CREW STOPPED ACFT ON RUNWAY & MET BY EMERGENCY VEHICLES. ACFT TOWED TO RAMP FOR MX. PROCEEDED TO GVI OF NLG, NO FAULTS DETECTED. PERFORMED WIRE CHECKS, VERIFIED WIRING FROM PIN 4 OF PG029 NLG DOWNLOCK SWITCH TO GROUND, NO DEFECTS. VERIFIED WIRING FROM PIN 5 OF PG029 CONNECTOR TO GSD 3 PIN 38 NO DEFECTS. INSPECTED WIRING ON NLG HARNESS, IDENTIFIED A FEW NICKS IN HEAT SHRINK & TIGHT BEND IN HARNESS, WIRE INSULATION NOT VISUALLY COMPROMISED. INSPD NLG DOWNLOCK SWITCH CONNECTOR & RECEPTADE OF POSSIBLE BREACH OF MOISTURE. DETERMINED FINE DEBIRS DISCOVERED IN THE NLG DOWNLOCK SWITCH RECEPTACLE BREAKS THE SEAL ALLOWING MOISTURE TO ENTER. CLEANED & REMOVED DEBRIS FROM NLG DOWNLOCK SWITCH & CONNECTOR. REPLACED NLG HARNESS & SB680A-32-06, OPS CHKD GOOD. NO FAULTS DETECTED, WORK PERFORMED REF AMM 32-20-00 & SB580A-32-06.