What was found
EMERGENCY EXIT LIGHTS SEAT ROWS 30FED THRU 32FED DO NOT ILLUMINATE. FOUND FLOOR PROXIMITY LIGHT ASSY AT SEAT 31F DISLODGED, R & R FLOOR PROXIMITY LIGHT IAW AMM B737-A-33-51-06-00A-720A-A, NO HELP. REVIEWED THE HEALTH STATUS OF EMERGENCY LIGHT SYS IAW AMM DMC-B787-A-33-51-00-09B-300D-A. FOR WCU 24 FOUND ITS STATUS AS 6078PBOO. FAULT CODE 6 INDICATES A LOAD FAULT. DISCONNECTED ALL 6 LIGHTS & CHECKED FOR VOLTAGE. NO VOLTAGE IS PRESENT WHEN THE EMERGENCY LIGHTS ARE COMMANDED ON IAW SSM DMC-B787-A-33-51-14-01A-054A-D. R & R WCU 24.2 LOCATED UNDER ROW 22 SEAT IAW AMM 33-51-07. LOADED ALL SOFTWARE TO WCU, NO FIX, LIGHTS WILL FLASH ONCE & REMAIN OFF. R & R WCU 24.2 BATTERY IAW AMM 33-51-07. NO FIX, SUSPECT A WIRE MAY BE SHORTED OR BATTERY, WIFI OFF 78-3350-9-9001 7692 ON 78-3350-9-9001 7967 BATTERY, WIFI E OFF 78-3350-9-9001 7692 ON 78-3350-9-9001 7967 AN EMERGENCY LIGHT IS SHORTED. R & R DEFECTIVE FLOOR LIGHT AT SEAT 30D.