What was found
FLT 119- IN CRUISE, LT AC BUSS FAILED. GENERATOR RESET DID NOT CORRECT CONDITION. ATTEMPTS TO POWER LT AC BUSS FROM OTHER POWER SOURCES NOT SUCCESSFUL. FLT DIVERTED & LANDED WITHOUT INCIDENT. REPLACED GROUND POWER CONTACTOR, CURRENT XFORMERS, & BUSS TIE C/B, NO EFFECT. PERFORMED FIM PROCEDURE 24-22-00. NO FAULTS FOUND. FOUND A SUSPECTED SHORTED AFT GALLEY FEEDER WIRE. WIRES DISCONNECTED, ISOLATION STILL OCCURRED. PROBLEM ISOLATED TO LT XFER BUSS & CAPTAIN'S CDU. WITH CDU REMOVED, OPS OK. DETERMINED CAPTAIN'S CDU C/B HAD MALFUNCTIONED. REPLACEMENT FIXED THE CONDITION. WIRE CHECKED OK & REINSTALLED. COFFEEMAKERS & GALLEY POWER LOAD CONTROL UNIT REPLACED.