What was found
ACFT RETURN TO FIELD, CREW STATED ALL FAULTS STARTED TO OCCUR AT WHEELS OFF GROUND. FIRST FAULTS ON PFR INDICATE ELEC AC BUS 2 FAULT, ELEC DC BUS 2 FAULT, ELEC GEN 2 FAULT.ALSO ON PFR TOO MANY FAULTS TO LIST! REF TSM 24-20-00-810-813 . CHECKED AIRCRAFT WIRING FOR SHORT TO GROUND BETWEEN PINS A/T1 B/ T2 C/T3 OF IDG ABD PINS 1 2 3 OF CONTACTOR MODULE 30XN2 REF ASM 24-22-01. THESE WIRES CHECK GOOD. REF LP 4888914, GCU 2 HAS ALREADY BEEN REPLACED. NEXT STEP IN TSM 24-20-00-810-813-A IS TO REPLACE THE IDG. REMOVED ENGINE 2 IDG REF. AMM 24-21-51-000-010-A. INSTALLED ON #2 ENGINE IDG UP TO INCLUDING STEPS A-M REF AMM 24-21-51-400-010-A. VERIFIED PROPER INSTALL AND TORQUE OF #2 ENG IDG FEEDER CABLES REF AMM 24-21-51-400-010-A STEP M AND GMM 09-10-05. REPLACED #2 IDG DISC SWITCH AND RELAY IDG DISC CTL 3XT AND #2 GCU, OP CKS GOOD WITH 3 ENG STARTS, REF TASK 24-20-00-810-807-A.