As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND AFT EMERGENCY OVERWING EXITS LOWER WARNING LIGHT LEFT AND RIGHT NOT WORKING. GROUNDED - YES. REMOVED AND REPLACED M1695 EMERGENCY BATT PACK THAT CONTROLS LIGHTS L1189 AND L1188 THAT WERE INOP. LIGHTS OPS NML REF WDW 33-51-21 PG 10.