What was found
ON PREFLIGHT FOUND FWD SECTION EMERGENCY LIGHTS INOP. CORRECTIVE ACTION: EXTENSIVELY TROUBLESHOT SYSTEM R&R FAULTY BATTERY POWER SUPPLY AND BATTERY PACK. PERFORMED CONTINUITY POWER GROUNDED CHECKS OF ALL FUNCTIONS AND SWITCHES. REPLACED CHARRED WIRE BETWEEN PIN M&N OF POWER SUPPLY CONNECTOR. TIGHTENED LOOSE POWER WIRE OF R1 DOOR OVERHEAD LIGHT ASSY IAW DC10 M/M DC 10-30 WDM 33-52 SYSTEM OPERATES NORMAL AND DC 10-30 33-51.