Equus Tachometer 8068 Wiring Diagram. For multiple spark and direct (coil on. Web page 1 installation instructions performance tachometer applications. equus fuel gauge wiring diagram from diagramschematicerika99.z22.web.core.windows.net Web connect the tachometer's lighting (white) wire to the instrument panel. Web page 1 installation instructions performance tachometer applications. Web equus tachometer wiring diagram source: