TC feedback that train was jerky. Rear train reported no abnormality. SM (ADM) cab ride on T414 and reported no abnormality. ~~~~~ TC feedback that train was jerky. Rear t     No FC were observed at Tims.Checked all M-cars found #2703 CH-02 Pre-charging resistor with burn marks.Changed the resistor and limited movement done,powering current ok on all M-cars. Done by Loong/Gopal/Pravin. 25/05/20