What was found
AIRCRAFT WAS GROUNDED: TAKEOFF CONFIG LIGHT ILLUMINATED ON TAKEOFF ROLL APPROX. 60 KTS. REJECTED AND RETURNED TO GATE. (AS THE NOSE WHEEL WAS COMING OFF THE GROUND ON TAKE,OFF ROLL- TAKE OFF CONFIG LIGHT ILLUMINATED AND AURAL WARNING ACTIVATED FOR APPROXIMATELY 2-3 SECONDS). PSEU BITE SHOWED SPD BRK DN FAULT. REMOVED AND REPLACED SPEED BRAKE TAKEOFF SWITCH IAW FIM TASK 27-62-00-810-808. ACCOMPLISHED PSEU GROUND-SELF TEST BITE. FAULT CLEARED AND TEST PASSED. NO PREVIOUS HISTORY, OPS NORMAL. REF.FIM 32-09-00.