What is the principle of the two wires in the reverse switch?
2 Answers
The principle of the two wires in the reverse switch is controlled by the controller motherboard for forward and reverse rotation, with the internal processor of the controller handling the conversion. There is a reverse signal wire on the reverse gear controller, which can be connected to the on-off switch on the right handlebar along with the negative terminal. The direction of the power input pulley on the engine side remains unchanged, while the reverse output gear inside the transmission engages with the output shaft, driving the output shaft to rotate in the opposite direction, ultimately causing the wheels to rotate backward for reversing. Below is an extended introduction: Reverse function: The controller has an added reverse function, which is disabled during normal riding. When the user stops, pressing the reverse function key enables assisted reversing, with the reverse speed not exceeding 10 km/h. High-speed control: The latest microcontroller designed specifically for motor control is used, incorporating a new BLDC control algorithm suitable for high-speed (below 6000 rpm), medium-speed, or low-speed motor control.
With years of research in automotive circuits, the principle behind the two wires of a reverse light switch is actually quite simple. One wire connects to the positive terminal of the power source, typically coming from the battery or fuse box; the other wire connects to the positive input of the reverse light. When the gear is shifted into reverse, the switch closes internally, allowing current to flow from the power wire through the switch to the reverse light, illuminating it to alert vehicles behind that you're reversing. It functions much like an on/off switch in a circuit. In daily use, if the switch has poor contact or corrosion, or if the wiring is aged and open-circuited, the current is interrupted, and the light won't turn on. For troubleshooting, you can use a multimeter to test continuity or observe if the light responds promptly when shifting into reverse. Maintenance should focus on waterproofing and dust prevention, regularly cleaning the contacts to avoid freezing in winter affecting switch response. Understanding this principle helps in self-diagnosing issues—like checking the fuse first and then the switch if the light doesn't work, saving a trip to the repair shop. Safety comes first—reverse light failure at night increases the risk of rear-end collisions.
