Wiring Harnesses & Electrical - OEM-Fit Reproduction Components

Keep your classic or muscle car’s electrical system running the way it did from the factory with reproduction wiring harnesses and electrical accessories engineered to OEM specifications. From complete wiring harness sets and individual lead wires to battery cables, switches, and update/conversion products, each component is manufactured to match the original routing, connectors, and circuits of your vehicle’s factory wiring—so everything from your headlights to your dash gauges works the way it’s supposed to.

Our electrical components are engineered for accuracy first: harnesses are built connector-for-connector and circuit-for-circuit to reproduce the original factory design, while update and conversion products let you add modern reliability—electronic ignition conversions, alternator upgrades, courtesy light delay modules—without a from-scratch rewire. Every harness, switch, and cable is manufactured and tested to deliver dependable, factory-correct performance, with coverage organized by exact year, make, and model rather than treated as interchangeable across model years.

Factory Interiors proudly supplies wiring and electrical products from Lectric Limited, the oldest manufacturer of accurate reproduction wiring harnesses in the world, with over 50 years of specialization and its own in-house Chicago-area manufacturing facility. Use the Vehicle Selector above to find the correct wiring or electrical component for your year, make, and model, or browse below to explore available options. Whether you’re chasing NCRS or Bloomington Gold judging points or simply getting your car running right, Factory Interiors makes it easy to restore your vehicle’s electrical system with confidence.