The key switch or power switch is in the on position.
The fuse or circuit breaker has been checked or reset.
The scooter has been pushed to walking speed before engaging
throttle.
Next
Step: Disconnect the Brake Switch
Disconnect the brake lever switch
connector from the speed controller. Sometimes the brake switch
becomes faulty and locks into the on position which makes the speed
controller turn off the motor. If the scooter works after
disconnecting the brake lever switch then the brake switch is faulty
and needs to be replaced.