What was found
ON ORIGINATING FLOW TWO EMERGENCY LIGHTS DIDN'T COME ON. REMOVED FROM SERVICE. PLACED ON MEL 33-21-01. RETURNED TO SERVICE. CLEARED BY REMOVING CEILING PANEL 233ELC (PANEL ID ON WM 33-50-50 #4) CHECKED FOR PWR ON PIN C OF P0388, NO VOLTAGE. CHECKED GROUND ON PIN H & D OF P0388. GOOD CONTINUITY TO AC GROUND. REINSTALLED PANEL 233LC. R&R BATTERY ON EMR BATTERY PACK #2 IAW AMM 33-50-01-000-801-A/400-802-A PAR 1-7. NO HELP. CHECKED CONTINUITY ON CANNON PLUG P0361 PIN R# TO P0359 PIN J. GOOD CONTINUITY. CHEK AC GROUND ON P0361 PIN S# & T#. GOOD GROUND FOUND. CHECKED VOLTAGE ON P0361 PIN R#. NO VOLTAGE. REMOVED EMERGENCY LIGHT POWER UNIT #2 IAW E175 AMM 33-50-01-000-801-A. INSTALLED A SERVICEABLE ELPU IAW E175 AMM 33-50-01-400-801-A. ELPU #2 OPS TEST GOOD IAW E175 AMM 33-50-01-710-801-A. EMERGENCY LIGHTS OPS TEST GOOD IAW E175 AMM 33-50-00-710-801-A. RETURNED TO SERVICE.