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Interactive Wiring Diagrams
Click any circuit to trace it through the harness — wire gauge and current rating, expected voltages, what it looks like when it fails, and how to test it with a multimeter.
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Reference
Wire Gauge & Current Rating
Continuous current ratings for wire bundled inside a loom at engine-bay temperature. These are deliberately conservative — a wire run in free air will carry more, but almost nothing in a harness is in free air.
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Every circuit shown here is one we build, label and bench-test before it ships.