As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INOPERATIVE EGT INDICATION ON NR 2 ENGINE. REPLACED EGT HARNESS WO635 CHECKED CONTINUITY AND PERFORMED HIGH POWER RUNUP. OPS CHECKED OK. ALUMEL/CHROMEL TERMINALS ON LEG NR 4 SEPARATED FROM WIRES. INSULATION BREAKDOWN. RESISTANCE CHECKED AT 5 TO 50 MEGA OHMS (SHOULD BE 1000 TO 2000).