What was found
EMER LIGHT SWITCH IN GALLEY WILL NOT TURN EMER LIGHT ON. REMOVE & REPLACED EMERG & FA EMERG TOGGLE SWITCHES AS PER ESPM 20-45-51, R&R RELAY K198 P/N:M83536/17-002L PER AMM 20-42-00. OPS CHECK FAILED PER AMM 33-51-00. R&R THE BATTERY PACK & HOLDER ASSY. AS PER AMM 33-51-17. OPS CHECK DID NOT PASS. NEEDS FURTHER TROUBLESHOOTING. REFER TO NEXT CONTROL FOR FURTHER MAINTENANCE ACTIONS. FOUND OPEN WIRE AT PL 123 PIN J. REPAIRED PIN J IAW WM 33-50-01. PERFORMED OPS CHECK IAW AMM 33-51-00. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED.