TIMS showed BCU fault at car 3655 with Wheel slip slide indication. Fault self-cleard. ~~~~~ Check found Tacho gen 1 & 2 resistance measure from BCU cannon plug was fluctuating. Found tacho 1 & 2 plug was loose-tightened. All 4 tacho gen resistance within criteria. Dump v/v test ok and no sign of wheel flat. Depot shunting no w/s/s light indication on. To be further monitor on M/L. Done by Sanip/Firduas. 8/11/20.