The electric vehicle operation, the motor suddenly belch belch two times, then do not go, I opened the electric car controller, well, turn the fuse is good, good
Also, are you sure the change controller is good and the voltage is the same?. Second, consider your wiring problem.
Your "thump, thump, and most likely is that the controller and the motor Holzer bad.
Do you have a multimeter?. In addition, turn the line in order, not wrong. Only after rough red, thick black, the switch and the motor phase / Holzer. Don't pick it up