making wiring harness from scratch
Hey 4spdragtop
A little about factory service manual wiring diagrams. You can tell the wire gauge by the circuit identifier. Here's a section of the '72 Demon rear harness diagram. In the circuit identifier B2-18V, the B2 is the circuit name (so you can follow it page to page if necessary) and the 18V denotes 18 gauge wire, Violet in color. You might see a color identifier such as ODGN* that would be Orange with a Dark Green tracer. The wire gauge is predicated on the fuse protecting it and the expected draw, of course. So you should be able to get the info you need from a similar car/year wiring schematic by looking at corresponding lights, gauges, accessories etc.
Hey 4spdragtop
A little about factory service manual wiring diagrams. You can tell the wire gauge by the circuit identifier. Here's a section of the '72 Demon rear harness diagram. In the circuit identifier B2-18V, the B2 is the circuit name (so you can follow it page to page if necessary) and the 18V denotes 18 gauge wire, Violet in color. You might see a color identifier such as ODGN* that would be Orange with a Dark Green tracer. The wire gauge is predicated on the fuse protecting it and the expected draw, of course. So you should be able to get the info you need from a similar car/year wiring schematic by looking at corresponding lights, gauges, accessories etc.
