I'm working on a 4-cylinder Kubota deisal auxiliary engine
with what appears to be a Kubota 34070-75600 alternator
. What's confusing to me is that there is only a single
wire (orange) coming from the L-IG terminal block. I haven't found a schematic yet that labels which is which. From what I've read, either terminal might be used to excite the coil. What the orange wire actually does is run up to the ignition switch where it terminates on a terminal with all the instrument lights, so I surmise that it is energized when the switch is in the "ON" position. From this I surmise that it excites the alternator
The other wire (besides the BATT+ connection), the grey wire, runs up to the tachometer's "SIG" terminal, so I surmise that that is exactly what it is.
I'm very green to all of this, so any words from the wise would be welcome. Little of this is as the drawing, it seems.