Could it be possible that a tach could work without +12V attached to it (with only the tach pulses + GND)? There are only two wires attached to the gauge but then again, the third might be just missing.
.. Maybe "B" is for Battery but then again, the terminal bridge from the +12V to the "4"...
Hi guys,
I have an old Suzuki tachometer that I got for free and I am trying to get working with my Mercury 60HP outboard. My outboard requires a "6 pole" connection to the tach gauge.
The back of the tachometer has four terminals: "12", "B", "4" and "G". the B and 4 terminals are connected...
