(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 using the meter 2 and check that the handle is connected (ordinary long-closed handle)

(3) Check the handle and use an iron wire to short-circuit the positive and signal lines of the handle If the car turns to prove that the steering wheel is bad, it needs to be replaced or repaired urgently. Turn on the power, turn the handle, and use a multimeter to measure the positive and signal lines of positive 5V <1-4> The handle

(4) Whether the controller is good or bad can be short-circuited with the positive 5V of the handle line. The easiest way is to smell the controller if there is any burnt smell. If there is, it means that the controller is broken

(5) Check whether the motor is good or not .