Train encountered rear M2 car power fault while arriving station. Reset - ok. Fault recurred departi ng ORC1,NEW1,NOV1. ~~~~~ 2527 encountered power fault while arriving station, Reset - ok. Fault recurred departing ORC1,NEW1,NOV1.  2527 checked/found L1/L2/K1 arc tips worn-out. Replaced the worn-out arc tips. Checked CCD shoes/fuses, resistors & earth brushes condition - OK. Conducted limited movement & found power fault indication lit up at #2527. Checked/found traction motor #4 terminal shorted to GND. Notif 2262408 raised to RSW.  Fazly/Farid/Hanafi 44287  Name                          : Hanafi / Redzwan  Date of Occurrence            : 31/3/21  EMU / Equipment / Location    : 2527 / TM 4  Description of fault / cause  : TM 4 motor shorted to ground /                                   causing power fault.