What was found
EMERGENCY EXIT LIGHTS WILL NOT TEST. NONE OF THE LIGHTS WILL ILLUMINATE UNDER THEIR OWN BATTERY POWER. COMPLIED WITH OPS CHECK OF BATTERIES IAW MM 33-50-00. OPS CHECK GOOD. FOUND DURING OPS CHECK THE LIGHTS ARE NOT TURNED IN THE SEQUENCE REMOVED COCKPIT OVERHEAD SWITCH PANEL, INSPECTED SWITCH & CONNECTOR. NO DEFECTS NOTED. FOUND BATTERY 4 POWERS RELAY TO TURN ON EMER LIGHTING WITH POWER OFF ACFT. REPOSITIONED #3 & #4 BATTERIES & FOUND SYS TO PASS OPS CHECK. RETURNED #3 BATTERY TO ORIGINAL POSITION. CHECKED #4 BATTERY IAW WDM 33-50-01. INSTALLED A REPAIRED BATTERY IN #4 POSITION. OPS CHECKED LIGHTS, OPS CHECKED GOOD. RECHARGED BATTERIES.