Restore your Ford ’s electrical system with precision-engineered wiring harnesses and electrical components designed specifically for your vehicle. Each harness is manufactured to match the original routing, connectors, and circuits of your Ford —restoring the wiring behind the dash, under the hood, and through the body to factory-correct, or factory-improved, condition.
Our Ford electrical lineup includes complete wiring harness sets, battery cables and ground straps, switches, electrical devices, and update/conversion products such as alternator upgrades and electronic ignition conversions. Every component is manufactured and tested to deliver dependable, factory-correct performance, and is organized by your vehicle’s exact year to ensure the harness or component you order is the one built for your Ford —not a close approximation.
Use the Vehicle Selector above to find the correct wiring or electrical component for your Ford , or browse below to explore available options. Whether you’re chasing judging points with a numbers-matching restoration or simply getting your Ford running right, Factory Interiors makes it easy to restore your electrical system with wiring products proudly made in the USA.
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1964-1973 Ford Mustang - Shelby Classic Update Series Alternator Conversion Harness, built to original specification.
use with G.M. 700R4 or 2004R automatic trans. EXCEPT 4L60E or 4L80E. Completely externally installed kit allows for automatic operation of the torque converter lock-up (overdrive) without installing the computer!!!! Kit includes instructions.
use with G.M. 700R4 or 2004R automatic trans. EXCEPT 4L60E or 4L80E. Completely externally installed kit allows for automatic operation of the torque converter lock-up (overdrive) without installing the computer!!!! Kit includes instructions.
1987-1989 Ford Mustang Classic Update Series Alternator Conversion Harness, built to original specification.
1987-1989 Ford Mustang - Shelby Classic Update Series Alternator Conversion Harness, built to original specification.
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