Color Wiring Diagrams for Chevy II & Nova - ClassicCarWiring 1970 1971 Chevy Nova Color Wiring Diagram (with console gauges) $17. Quick view Choose Options. 1972 Chevy Nova Color Wiring Diagram. $17. 1; 2 70 Chevy Nova Electrical Wiring Diagram Manual 1970 - I-5 this is for a new 1970 chevy ii nova wiring diagram manual. the manual shows the color of the wires, location that each wire runs to and gauge of wire.