As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING EN ROUTE CLIMB, THE NUMBER 1 ENGINE FIRE DETECTION LIGHT FLICKERED ON AND OFF, LASTED A FEW SECONDS THEN WENT OFF AND STAYED OFF. ALL ENGINE INDICATIONS READ NORMAL. FOUND FORWARD PLUG CONNECTOR STRAIN RELIEF RUBBING WIRE. REROUTED WIRING FOR BETTER RELIEF AND RAN ENGINE AT FULL POWER AND HALF POWER WITH NO DEFECTS NOTED.