WH Custom Fuel Injection Wiring Harness, 86-93 Ford 5.0L SKU: 6048

Fuel Injection Wiring Harness for 1986–93 Ford 5.0L EFI Conversion

Finally, a standalone Fuel Injection Wire Harness tailored specifically for your Early Bronco or other classic vehicle running a 5.0L Ford EFI motor from a 1986–93 Ford Mustang or other Ford car or truck. Built to cleanly integrate Ford's Mass-Air EFI system into your classic Bronco or early Mustang, this harness is engineered to simplify the swap and get you up and running with minimal hassle. It supports SEFI 5.0L (302) and 5.8L (351W) engines using mostly Mustang donor components but leaves room for a smart mix-and-match approach with select parts from other Ford models.

Finished in high-temp zip loom with OEM-style harness wrap, this system includes everything you need to wire up your EFI: fused circuits, relays, firewall grommet, and full instructions. Whether you’re ditching a carb or refreshing an older EFI swap, this harness was built to do the job clean, fast, and right.

• Built for Mass-Air EFI Systems – Designed for 1986–93 Mustang-style SEFI 5.0L and 5.8L setups

• Bronco-Ready Fitment – Sized specifically for 1966–77 Ford Bronco with extra length for clean routing

• Includes Full Hardware – Comes with firewall grommet, relays, fuses, and complete instructions

• Clean Professional Finish – Assembled using high-temp zip loom and harness wrap for a factory-quality look

• Designed for Passenger-Side Intake – Setup assumes passenger-facing intake when in stock configuration

Stop fighting hacked-together EFI wiring - this harness takes all the guesswork out of your 5.0L swap and gets your Bronco running smooth, clean, and reliable.