1969–1970 Mustang Wiring Harness
The 1969–1970 Mustangs marked the pinnacle of classic Ford styling and performance—and with a Painless Performance Direct-Fit Chassis Harness, you can ensure their wiring lives up to the same standard. The Painless 22-Circuit Direct-Fit Harness for 1969–1970 Mustangs delivers OEM-style fitment with modern reliability, using color-coded Ford wiring and printed circuit IDs on every wire for quick and accurate installation.
This harness features a covered micro-fuse block and built-in 20-amp accessory relay, making it ideal for powering modern upgrades like fog lights, electric fuel pumps, or EFI systems. Most factory connectors come pre-installed, eliminating guesswork and splicing. Whether you’re performing a factory restoration or a full custom build, this Painless kit provides the perfect blend of classic fit and modern functionality.
Why Choose Painless for Your Mustang Build
Designed specifically for 1969–1970 Ford Mustangs
Factory Ford color-coded and printed wiring for clarity
Pre-terminated factory connectors for plug-and-play installation
Includes covered micro-fuse block with modern blade-style fuses
Built-in 20-amp auxiliary relay for electric fuel pumps or accessories
Works with carbureted or standalone EFI powertrains
Supports stock or aftermarket gauges and accessories
Backed by the Painless lifetime warranty and U.S.-based support
This Painless 22-Circuit Direct-Fit Harness brings your Mustang’s wiring system up to modern standards while maintaining the correct factory fit and finish. The 12-fuse setup with horn and accessory relays provides reliable circuit protection, while each wire is printed and color-coded for easy troubleshooting. The included connectors fit all major factory switches and lighting components, ensuring an OEM-quality installation without custom fabrication.
Key Features
22 total circuits / 12 fuses with horn and accessory relays
Factory-fit design for 1969–1970 Ford Mustangs
Includes covered micro-fuse block and 20-amp auxiliary relay
Ford color-coded and printed wires for identification
Pre-installed factory-style connectors for quick assembly
Modern mini blade and maxi fuse protection
Works with carbureted or EFI engine setups
Organized harness sections for engine, dash, and rear lighting
Includes Circuits For
A/C & Heat, Accessory / Cigarette Lighter, Accessory Relay, Backup Lights, Brake Lights, Charging, Courtesy & Dome Lights, Electric Choke, Emergency Flashers, Fused Power Source, Glove Box Light, Headlights, Horn (Relay), Ignition Coil, Instrument Panel Lighting & Gauges* (Ammeter, Brake Warning Light, Fuel, Gear Indicator Light, Oil, Tachometer, Temperature, Voltmeter), Park Lights, Radio/Clock (Constant & Switched), Starting, Tail & License Plate Lights, Trunk Light, Turn Signals, Wipers, and Washer Pump.
Perfect For
Owners wiring a 1969 or 1970 Ford Mustang who want a factory-style, plug-and-play harness with modern protection and expandability. Ideal for restorations, Pro Touring builds, or daily drivers—this Painless system delivers OEM appearance, modern reliability, and the confidence only a Painless harness can provide.