What was found
EMERGENCY EQUIPMENT ON SERVICE CHECK CARD ITEM 10, OPERATIONAL CHECK OF EMERGENCY LIGHTS, TEST SHOWS FAULT MESSAGE: 256241- ESCAPE SLIDE LIGHT/ EPSU (13WL) AFT L- SCOURCE: CIDS 1-CLASS 1. REPLACED BATTERY IN FIN 13WL EPSU, PER AMM 33-51-38. CONDITION SAME. FOUND LEFT AFT EMERGENCY SLIDE LIGHTS SHORTED TO GROUND.