(1) Check whether the battery output of the electric vehicle is normal. If the output is too low, the battery is bad. The battery needs to be replaced urgently.
(2) Pull out the brake cable. If the rotation of the car proves that the handle is broken, the handle should be replaced or repaired with Table 2 and the handle should be checked (ordinary long-closed handle).
(3) Check the turning handle and use iron wire to short-circuit the turning handle and the signal line. If the car turns, it proves that the turning handle is bad and needs to be replaced or repaired urgently. Turn on the power and turn the handle with a multimeter to measure the positive 5V <1-4> of the positive and signal lines.
(4) Whether the controller is good or bad, you can short-circuit the positive 5V of the handle wire. If the handle turns, it means that the controller is fine. The easiest way is to smell the controller to see if it smells burnt. If there is, it means that the controller is broken.
(5) Check the quality of the motor. If the contact of the motor carbon brush is not real, it will also cause the power to not go.
