As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT DID NOT DISPLAY DISARMED MESSAGE WHEN EMERGENCY LIGHT SWITCH WAS SELECTED TO OFF. FOUND THAT PIN 8 ON PO301 CONNECTOR WAS NOT GROUNDED. FOUND PIN H AT GS0287SN GROUND STUD LOOSE. RE-INSERTED PIN H IAW SWPM 20-35-03. EMERGENCY LIGHT MESSAGES NOW OPERATE NORMALLY.