TC feedback brake on train indicator light was flickering and emitting a clicking noise. ~~~~~ TC feedback brake on train indicator lig     #2540 Fault code 301/307/308.Check #3539 cab brake on train indicator light no flickering but completely new light.Further check found #2540 brake on local indicator never light up.#2540 BCU swap to #1540 fault transfer at #1540.Replace BCU AT #1540,WDC setting done and function test brake on local lighted,brake off train lighted,Check both cab #3539/3540 brake on train light.Brake cyclic test ok.BCP within criteria.No occurance of fault. #1540-BCU:- Old: 1820025 New: 1812103 Not.CSC: 2411471 raise. Done by Saini/Haslan/Asruddin/Zulq.  25/08/22