What was found
WHILE PERFORMING THE OPERATIONAL CHECKS ON BATTERY, BOTH THE T1 (140 DEGREE) SWITCH AND T2 (160 DEGREE) SWITCH WERE IMPROPERLY WIRED. TEMP SWITCH T1 WAS WIRED TO PINS C AND D INSTEAD OF PINS C AND E AND SWITCH T2 WAS WIRED TO PINS E AND F INSTEAD OF PINS D AND F. IN EVENT OF THERMAL RUNAWAY ON THE AC, 160 DEGREE SWITCH NOT ONLY PROVIDES A RED CAS AND CREW MWP BATT OVHT INDICATION BUT ALSO REMOVES THE BATTERY FROM CHARGING CIRCUIT, WITH THIS DEFECTIVE SWITCH HARNESS INSTALLED NOT ONLY WOULD A THERMALLY UNSTABLE BATTERY BE ALLOWED TO CONTINUE TO CHARGE AND RUNAWAY BUT CREW WOULD NOT HAVE INDICATION THAT EVENT IS TAKING PLACE.IF THEY HAD EICAS CONFIGURED TO VIEW A PAGE OTHER THAN THE SUMMARY OR ELECTRICAL PAGES.