As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LIGHT DURING EMERGENCY TEST LEVEL 1 ALERT: "EMER LT BAT1 LOW" DISPLAYED. RE WDM 33-51-01, WIRING CHECK FROM EMERGENCY LIGHT BATTERY POWER SUPPLY UNIT CONNECTOR P1-1756B PIN 5 TO MSC CONNECTOR R5-1114B PIN 1K FOUND OK. EMERGENCY LIGHT BATTERY POWER SUPPLY UNIT REPLACED IAW MM 33-51-01-4 AND TESTS OK.