As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE WARNING INDICATION IN FLIGHT NOTED BY CREW. FLIGHT DIVERTED TO CLOSEST AIRPORT. UPON FURTHER INVESTIGATION IT WAS DISCOVER THAT THE THE FIRE WARING WAS A FALSE ALARM, CAUSED BY A WIRE SHORTED TO GROUND IN THE ACFT OVERHEAD PANEL. ACFT WAS REPAIRED AND RETURNED TO SERVICE.