What was found
TAKE OFF CONFIGURATION LIGHT ILLUMINATED AFTER THE POWER WAS ADVANCED TO TAKEOFF POWER. REJECTED TAKEOFF, THE AIRCRAFT WAS CONFIGURED PROPERLY. TRIM IN GREEN TAKEOFF BAN, FLAPS AT 01 DEGREES. BRAKES OFF, SPEED BRAKE LEVER STOWED, AT ARM. THE AIRCRAFT WAS GROUNDED. MAINTENANCE ACCOMPLISHED ATBT AND PERFORMED FIM 27-81-00-810, FOUND CODE 27-62001 FAULTED. MAINTENANCE ALSO REPLACED THE SWITCH S651 IAW AMM 27-62-34, AND PERFORMED SATISFACTORY OPERATIONAL CHECK.