Ford Engine Harness M-12071-E302 and M-12071-H302

5.0 EFI Wiring Harnesses (Ford Motorsport) - Ford 5.0 Engine Harness

Ford 5.0 Wiring Harness wire colors

Ford Main Harness M-12071-C302

This diagram shows the wire colors and connectors and what their purpose is on the Ford 5.0L engine.

5.0 EFI Wiring Harnesses (Ford Motorsport) - Ford 5.0L Main Harness

H.E.G.O. Sensor Harness M-12071-D302/H302

5.0 EFI Wiring Harnesses (Ford Motorsport) - Ford 5.0L Sensor Harness

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About The Author

Founder / Administrator at  | Staff Profile

Jim Oaks is the founder of TheRangerStation.com, the longest-running Ford Ranger resource online since 1999. With over 25 years of hands-on experience building and modifying Ford Rangers — including magazine-featured builds like Project Transformer — Jim has become one of the most trusted authorities in the Ford Ranger off-road and enthusiast space.

Since launching TheRangerStation.com, Jim has documented thousands of real-world Ranger builds, technical repairs, drivetrain swaps, suspension modifications, and off-road adventures contributed by owners worldwide. TheRangerStation.com has been referenced in print, video and online by enthusiasts, mechanics, and off-road builders looking for practical, and experience-based information.