I just installed a NOS "classic series" OMC tachometer in my boat. It does not have the modular hookup, but it has 4 wires coming out of the unit. I hooked the purple up to the power source, the grey to the tachometer lead in my control box (1977 Power Pilot), black to a ground, and blue to the light source. I switched it to "6", like the manual said, but still nothing.
Any ideas?
Thanks
Any ideas?
Thanks