Main Engine Harness Assembly 00-03

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$1,127.66
$1,127.66
$670.45
(You save $457.21 )

Main Engine Harness Assembly 99-03 7.3L Powerstroke

   *Note - These are electrical harnesses and are NOT eligible for return / refunds. DO NOT ORDER if you haven't used the Contact Form and emailed us your VIN to confirm which harness you should order.  

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  • 5
    2003 f250 7.3 eng harness

    Posted by Robert rolfe on Oct 17th 2024

    Fit great, everything works perfect. Thx

  • 5
    Main Engine Harness

    Posted by John Hudson on Jun 25th 2024

    After my 2002 F350 7.3 much troubleshooting, I learned that I burned up the engine wiring harness last October. At first, I ordered a replacement harness for around $179 on Amazon. The truck did run, but was flashing codes and not charging. Afterwards, I ordered a more expensive harness off of Ebay and unfortunately, my truck wouldn't even start. I finally bit the bullet and ordered this harness from Riffraff Diesel. Though it was pricier than the other two harnessess combined, this harness flawlessly works. Please learn from my bad judgement and buy a quality harness fron the get go. It will save you money and hours of frustration!!

  • 5
    Genuine and good

    Posted by Matthew T on Mar 26th 2023

    Replacing the engine wiring harness is one of the best preventative maintenance items you can do to ensure all your sensors, glow plugs, and injectors have the best connection back to the PCM. Also be sure to check the wiring harness connector and the wiring that can rub on the left valve cover as this might be your issue.

    My old wiring harness has seen enough oil over the years that the wiring casing was disintegrating every time I unplugged things, leaving bare copper all over the place. Yikes!

  • 5
    MAIN ENGINE HARNESS ASSEMBLY 00-03 - F81Z12B637FA

    Posted by Ryan on Aug 25th 2022

    Works great no issues, very happy customer.

  • 5
    Main engine harnes assembly 00-03- F81Z12B637FA

    Posted by Jeff on Sep 9th 2021

    everything as promised with fast shipping. Clay was great to work with and answered any questions. liked working with them so much that I broke my fan clutch and am about to order a new one from him!

  • 5
    Main engine harness

    Posted by Richard P. on Jun 5th 2020

    Great product, took less than an hour to install, easy plug and play.