As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED THAT THE EEPL EXIT SIGN AT THE AFT DOOR AND AT THE OVERWING EXITS IN THE CABIN WERE FLASHING ON & OFF AND WOULD NOT RESPOND TO COMMANDS DURING FLIGHT. MAINTENANCE FOUND A FAILED CONNECTOR IN THE WIRE HARNESS FOR THE OVERWING LIGHTS AND REPLACED THAT CONNECTOR PLUG. THE FUNCTIONAL CHECK OF THE SYSTEM WAS GOOD.