What was found
DURING TAKEOFF ROLL WARNING HORN CAME ON. PERFORMED ENGINE GROUND RUN. RAN ENGINES AT TAKE OFF POWER WITH NO HORN NOTED, CHECK PITCH TRIM WARNING OUT POWER. CHECKED GOOD. INSPECTED TONE GENERATOR AND WIRE HARNESS WITH NO DEFECTS, CLEANED CONNECTOR AND INSTALLED. CLEANED 80% SWITCHES IN THROTTLE QUADRANT. INSPECTED SQUAT SWITCHES WITH NO DEFECTS NOTED, OP'S CHECKED NORMAL IAW MM 27-40-00-201