As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, CABIN DOOR LIGHT CAME ON BEFORE LIFTOFF. PILOT ABORTED TAKEOFF AND WENT BACK TO RUN UP PAD. CHECKED DOOR AND TRIED ANOTHER TAKEOFF, DOOR LIGHT CAME ON BEFORE ACFT LT THE GROUND. RETURNED TO RAMP, MECHANIC RESET DOOR LIGHT SWITCH. SYS FUNCTION CHECKED SATISFACTORY.