As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE TAXI LIGHT WAS TURNED ON WHEN THE SWITCH WAS IN THE OFF POSITION. THE TECH TROUBLESHOT THE SYS AND DISCOVERED THE TAXI LIGHT CIRCUIT BREAKER HAD FAILED. THE TECH REPLACED THE CIRCUIT BREAKER. NO RECOMMENDATION AT THIS TIME.