TC reported train encountered power fault at RM1 car while arriving station. TC attempted to reset -to no avail. ~~~~~ 1502 TC reported power fault while arriving station. TC attempted to reset - to no avail.  1502 FC 136/820/821. Found charging resistor faulty - Replaced. Perform limited movement but power fault still persisted. Suspect TM3 shorted to GND. D/L fault trace & found Earth Fault (EF). Checked INV2 very low resistance compared to INV1 (without removing cable. M35 to Rail, M36 to Rail, M37 to Rail). To confirm shorting comes from INV2 or traction motor. OPS 20 raised to follow-up.  Ridzuan 43955 TO FOLLOW UP RECTIFICATION.  1502 TM 3 found shorted to GND. Meggar test 0.1 Mohm. PRCB isolated & tagged. Notif 2156964 raised to RSW.  Chan GF/Alcus    43955 Notif 2156964 Name                          : UPD CM TEAM Date of Occurrence            : 04/05/2020 Last Service Date             :   EMU / Equipment / Location    : 1502 / Traction Motor 3 Equipment Serial No. (if any) :   Description of fault / cause  : Power Fault / Traction Motor 3                                   Shorted to ground Measurements (if any)         : 0.1M/ohm