What was found
ON APPROACH, THE NLG DID NOT INDICATE GREEN. LIGHT REMAINED RED, ALL 3 LANDING GEAR WERE MANUALLY EXTENDED. ACFT LANDED WITHOUT INCIDENT. POST FLIGHT INSP WAS PERFORMED. R & R THE NLG POSITION SWITCH, R & R NLG LOCK SWITCH CONNECTOR PLUG, REPLACED 2 EACH WIRES FOR LOCK SWITCH. OPS CHECK GOOD, NO OTHER DEFECTS WERE NOTED. ACFT WAS RETURNED TO SERVICE.