As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 70 KTS ON A TAKEOFF ROLL. THE NO TAKEOFF CAUTION LIGHT ILLUMINATED WITH CORRESPONDING HORN. FLAPS SET 15. TRIM CENTERED AND SPEED BRAKE RETRACTED. PERFORMED STATIC GROUND RUN UP WITH SAME RESULTS (HORN AND CAUTION LIGHT). CLEANED MOISTURE AND CORROSION FROM LT SPEED BRAKE SWITCH CONNECTOR. OPS CHECK GOOD IAW MM CHAP 31-50-00. (FOR DETAILS REF. F.A.S. WO NR 06-2725)