As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABORTED TAKEOFF, AFTER MASTER CAUTION RED LIGHT ILLUMINATED FOR 2 SECONDS THEN WENT OFF. PILOT TAXIED OFF, RAN APPROPRIATE CHECKLIST THEN REQUESTED ANOTHER TAKE OFF. AIRCRAFT HAD NO MORE INDICATION PROBLEMS WITH MASTER CAUTION LIGHT FOR THE REST OF THE FLIGHT.