What was found
EMER LIGHTS FLASHING ENROUTE WITH SWITCH IN ARM POSITION. NOW ON STEADY IN ARM POSITION. BEGAN TROUBLESHOOTING, FOLLOWING FIM TASK 33·50·00·810·802-A SETTED EMER LT SWITCH TO THE ARM POSTION, LIGHTS DID NOT FLICKER, LIGHTS CAME ON WITH SWITCH IN ARM POSITION FOR MORE THAN MIN. GAINED ACCESS TO #2 EMER BATTERY, DISCONNECTED CONNECTOR P1360 FROM BATTERY, PLACED SWITCH ON ARM POSTION & LIGHTS DID NOT COME ON. REMOVED AND INSTALLED THE BATTERY IAW AMM 33-52-01. PERFORMED OPS CHECK WITH SAME RESULT, CONTINUED WITH FIM & GAINED ACCESS TO 1# EMER BATTERY. REMOVED #1 AND INSTALLED THE BATTERY IAW AMM 33·52-01, OPS CHECKED GOOD, AIRCRAFT OK TO RETURN TO SERVICE,