Painless Wiring 21-Circuit Direct Fit Ford F-Series Chassis Harness

Painless Performance's 21-Circuit Direct Fit Ford F-Series Chassis Harnesses are engineered specifically for classic Ford F-Series trucks, delivering a complete chassis wiring solution purpose-built to simplify electrical restorations, custom builds, and full system replacements. Designed around factory architecture, these application-specific harnesses integrate seamlessly with the truck's existing wiring infrastructure — no cutting, splicing, or guesswork required.

Key Features:

• Direct-Fit, Pre-Terminated Connections — Factory-style connections that are already pre-terminated allow for straightforward plug-and-play installation at factory mounting points, eliminating the need for custom fabrication
• Covered Micro-Fuse Block — A compact, enclosed fuse block provides clean circuit management with a built-in 20-amp auxiliary relay circuit for accessories such as fog lights or an electric fuel pump
• Ford Factory Color Codes — All wiring follows OEM Ford color coding throughout the harness for intuitive tracing and troubleshooting
• Custom-Printed Circuit Identification — Every wire is individually labeled with its circuit designation, making installation and diagnostics fast and straightforward
• 21-Circuit Coverage — Full electrical system coverage including headlights, taillights, turn signals, parking lights, brake lights, backup lights, ignition, charging, starting, gauges, dome light, radio, horn, wipers, emergency flashers, and more
• Gauge and Instrument Support — Dedicated wiring for fuel gauge, oil gauge, tachometer, temperature gauge, ammeter, brake warning light, and four-wheel drive indicator
• Switch Options Available — Variants are offered with or without headlight, ignition, dimmer, wiper, and brake switches to match your specific build requirements
• Mini Blade & Maxi Fuse Configuration — Modern fuse types deliver reliable circuit protection, complemented by multiple firewall passthrough grommets for clean, professional routing
• Engineer-Designed & USA Made — Every harness is developed using AutoCAD and the latest diagnostic equipment, with wires grouped into logical sections to simplify routing and minimize installation errors

Painless Performance has built its reputation as an industry leader by combining OEM-quality construction with performance-oriented engineering. Each harness ships with comprehensive color-coded installation instructions and detailed wiring diagrams. Whether you're restoring a classic F-Series to factory spec or building a custom street machine, these direct-fit harnesses deliver modern electrical reliability with the period-correct integration your truck demands.