How to Tell What Gauge Power Wire I Have in My Car
- 1). Disconnect the wire from the automotive electrical system.
- 2). Measure the diameter of the wire, not including insulation. If the wire is stranded, twist the strands together finger-tight before measuring the wire diameter.
- 3). Locate the measurement on the wire gauge table. Refer to an online resource, such as PowerStream.com, for an AWG table.