What was found
ENGINE CONTROL #2 LIGHT ON WHEN TAXING THE RUNWAY FOR TAKEOFF. LIGHT STAYED ON UNTIL ENGINE SHUT DOWN. ALL OTHER ENGINE INDICATIONS NORMAL. OCCURRED IN SAME LOCATION AS PREVIOUS WRITE-UP. GROUNDED - YES. PERFORMED EEC BITE REF B737-800 FIM 73-00 TASK 801. FOUND FAULT 75-10582 (TBV DEMAND AND POSITION SIGNAL DISAGREE ENG 2 CHANNEL A). REMOVED AND REPLACED #2 ENGINE HMU AND OPS/LEAK CHECKS NORMAL. AFTER IDLE RUN AND ACTUATORS TEST ENG CONTROL LIGHT STAYS OFF. NO FAULTS DETECTED ON EEC TEST.