Bike troubleshooting method

If you find that the mountain electric bicycle is broken should be repaired, and that the first thing is to first find out the fault can be repaired. That general professional repair personnel in a short time how quickly determine the fault lies in where?
1, the electric car did not turn up
In the case of electric, open the electric door lock. Measured with a multimeter whether the voltage motor leads can immediately determine the fault lines and control lines. Bike specific measurement method is measured with a multimeter DC gear controller or motor leads, turn to the governor whether the voltage measured can find fault.
Measurement results are voltage, it is determined that: bad motor or controller circuit failure of the motor to the lead, should be excluded. No voltage measurements, it is determined that: control line failure, should the next check.
The controller brake power plug is disconnected, and then turn the power switch. Car rotating, it is determined that: the brake switch is bad, has been causing a short circuit fault, the brake switch should be renewed. If the car does not turn, then again a good to the governor, to replace the original turn to. Such as the car rotates, it is determined that: the original to the governor is bad, causing the foldable bike electric does not turn, should get a new controller.
Measuring the battery compartment contacts, the power supply section can be determined immediately because the car does not turn cause failure. It is to measure the battery contacts with a multimeter DC gear box, to see whether the voltage display. If no voltage display, find open power locks, dashboard does not light up, it is determined that: Fuse Fuse off, should be replaced by fuses, wires off, welding wire breakage or should be renewed. If voltage display, turn the power locks, dashboard light is off, it is determined that: power locks broken, no power to get a new lock.
2, the electric car stop switch
The speed controller regulator turn the plug off, it can be determined to the governor or controller failure immediately. If the plug is disconnected to the governor to open the electric door lock car does not turn, determine: the governor is bad, re-installed, repaired. If the plug is disconnected to the governor, open the electric door lock, the car still turn, determine: the controller is bad and should be replaced.
I know these things and then, in the face of a similar failure, if the situation is more urgent, then you can do it yourself repaired.