What was found
WHILE PERFORMING TC#78233008 EMERGENCY LIGHTS OPS CHECK, FOUND LT AFT OVRWG EXIT LIGHT INOP. SUSPECT BATTERY PACK, CHARGER FAULTY. GROUNDED- YES. RELAMPED AFT LT OVRWG EMERGENCY EXIT SIGN IAW AMM 33-51-01-960-801, NO HELP. R & R LT MID CABIN POWER SUPPLY- NO HELP. ORIGINAL POWER SUPPLY & NEW POWER SUPPLY BOTH HAVE A BLOWN FUSE. BLOWN FUSE IS 4TH FUSE FROM CONNECTOR PLUG. WHILE T/S WITH NEW BATTERY, M1694, WITH D12452 NO BLOWN FUSE. R & R LIGHT ASSY 11-5833-21. INSTALLED, M1694 BATTERY WITH NEW ONE IAW WDM 33-51-13-8 & AMM 33-51-06-960-007. ACCOMP WINDOW LIGHT TEST, TEST PASS. ACCOMP EMERGENCY LIGHTS OP CHECK ALL PASS TEST IAW AMM 33-51-00-720-801, AMM 33-21-00-960-807, AMM 25-21-20-400-801 & WDM 33-51-11-5.