What was found
SHORTLY AFTER TAKEOFF LEVELING AT FL 330 / 280 KIAS, SPEED BRAKE LIGHT ILLUMINATED. PERFORMED ABNORMAL PROCEDURE PER AOM. FLIGHT RETURNED TO KMIA. REMOVED AND REPLACED 4 SPEED BRAKE SWITCHES, POSITION 1, 2, 3, & 4 IAW MAINTENANCE MANUAL 27-61-00, OPERATION CHECK GOOD.