3) Power on the Sensor, the LED will stay Green
4) Disconnect Switch Cable, the LED will still stay Green and calculate the
detected pulse from engine
5) Connect Switch Brown Cable and Disconnect again, the LED will flash
6) The sensor output Pulse signal with fixed Tach RPM ratio 4pulese/round,
which means it will output 66.6Hz when 1000RPM.
For example, if the input frequency is 100Hz @1000RPM, the sensor will
convert the signal and then output 66.6Hz @1000RPM
7) How to configure Tachometer?
Please set your Tachometer/RPM Gauge tach RPM ratio to 4 pulses/round,
then the Gauge will work properly.