What was found
CREW RECEIVED AUTO FLT WARNINGS (FAC 2, YAW DAMPER 2, RUDDER TRAVEL LIMITER 2, RUDDER TRIM 2, SDAC 2), NO DATA FROM ALL 3 ADIRU'S. MESSAGES OCCURRED AT SAME TIME. MESSAGES NOTED & CLEARED. APPROX 20 MINS LATER ECAM MESSAGES REAPPEARED W/NUMEROUS OTHER SYS MESSAGES; F/O`S PRIMARY FLT DISPLAY & NAVIGATION DISPLAY BEGAN TO FLICKER AS WELL AS LIGHTING & AUDIO VISUAL IN THE CABIN. DURING RAPID SEQ OF WARNING MESSAGES AN AC BUS 2 MESSAGE APPEARED, FOLLOWED BY AVIONIC VENT EXTRACT FAN C/B TRIPPING. DECLARED AN EMERGENCY, DIVERTED TO ORD. MX FOUND NR 2 GENERATOR FEEDER CABLE CONNECTOR ARCED AT FIREWALL DISCONNECT. MX REMOVED & REPLACED NR 2 ENG IDG CABLE ASSY, OPS TEST PERFORMED AND SYS CHECKED GOOD.