Replace Part#:
5C3Z9D930A，5C3Z-9D930-A
Fitment:

For 2003-2007 Ford F250 6.0L Diesel V8
For 2003-2007 Ford F350 6.0L Diesel V8
For 2003-2007 Ford F450 6.0L Diesel V8
For 2003-2007 Ford F550 6.0L Diesel V8
For 2004-2005 Ford Excursion 6.0L Diesel V8
How to Replace the Wiring Harness?
Step 1: Park your vehicle, and turn off its engine.
Step 2: Open the hood, and locate the fuse box in the passenger's area.
Step 3: In order to relieve the pressure in the fuel system, carefully remove the fuel pump fuse.
Step 4: Carefully disconnect the negative cable from the battery.
Step 5: Find your vehicle's fuel injectors. Usually, these components can be found in a spot where the engine block is connected to the fuel line.
Step 6: Find the old wiring harness. Check for rust, cracks and dirt. If the wiring harness isn't able to hold all the wires properly, then replace it with a new one.
Step 7: Push the center of wiring harness to release it from the fuel injector. Make sure that you slide the old wiring harness down the fuel line.
Step 8: Depress the clip that slides over the old wiring harness so you can release it from the fuel line.