I got a super deal on a Tach off a 1998 Harley Roadking Police bike. The bike is a single fire ignition (2 coils) just like the VN2K. However, the tach is still a dual fire (has only 3 wires), so Harley must have had an adapter in line somewhere, so I still need a single fire adapter. I see they are easy to make. Here is my question:
The diodes are necessary to keep current from the firing coil, going over to the other coil, and the resistor keeps the current at a level to keep the tach from spiking. Every schematic shows each pair of resistors and diodes twisted together...parallel. Since electricity takes the path of least resistance, why would the current not back flow through the resistor and bypass the diode all together?? Shouldn't the diode and resistor be soldered end to end (in series??)
The diodes are necessary to keep current from the firing coil, going over to the other coil, and the resistor keeps the current at a level to keep the tach from spiking. Every schematic shows each pair of resistors and diodes twisted together...parallel. Since electricity takes the path of least resistance, why would the current not back flow through the resistor and bypass the diode all together?? Shouldn't the diode and resistor be soldered end to end (in series??)
