Dorman 904-546 Fuel Injection Harness

Fuel Injector Harness for Ford Super Duty

This Dorman fuel injection harness is a direct replacement for the original wiring on select Ford diesel applications. Built to restore proper injector circuit operation, it uses quality materials and insulated electrical connectors to help resist corrosion in demanding engine-bay conditions.

Key Features

• Direct replacement fuel injector harness for OE fit and function
• Fits 2005-2007 Ford F-250 Super Duty, N/A
• Fits 2005-2007 Ford F-350 Super Duty, N/A
• Fits 2005 Ford Excursion, N/A
• 40-inch length with 16-gauge wire
• 11 wire leads and 11 connectors
• Black connectors with female connector type and male connector gender
• Heat shield included for added protection in high-temperature areas
• Direct injection fuel system application
• Controls 8 fuel injectors

Detailed Description

Dorman 904-546 is a replacement fuel injector harness for Ford F-250 Super Duty, Ford F-350 Super Duty, and Ford Excursion applications listed above. It is built to match the original harness layout so the injection system can operate as intended, while the insulated connector design helps reduce corrosion at the connection points. The 40-inch harness length, 16-gauge wire, and direct injection configuration make this a practical OE-style service part for diagnosing or repairing injector wiring concerns. Part number 904-546 is also a useful reference when verifying the correct harness for these Ford diesel applications.

This part cross-references Standard Ignition IFH4 for the same application.

Common Issues This Harness Can Address

• Intermittent injector signal loss caused by damaged wiring
• Corrosion at injector connector terminals
• Cracked, heat-damaged, or brittle harness insulation
• Misfires or rough running related to injector circuit faults
• Hard-start or no-start conditions tied to injector harness failure

Installation Notes and Tips

Verify connector count, wire routing, and engine application before installation. Inspect the injector connectors, nearby terminals, and harness clips for heat damage or corrosion before connecting the replacement harness. Confirm all connections are fully seated and routed away from hot or moving components. For fitment confirmation, match the vehicle to the listed applications for 2005-2007 Ford F-250 Super Duty, 2005-2007 Ford F-350 Super Duty, or 2005 Ford Excursion.

Quality Assurance

This Dorman replacement harness is made to match the fit and function of the original equipment part. Its insulated electrical connectors and heat shield support reliable service in the engine compartment, and part number 904-546 provides a direct reference for ordering and fitment verification.