* Under the hood in the Power Distribution Box (PDB): This is the most likely location. The PDB is usually a large black box containing many fuses and relays. You'll need to consult your owner's manual or a wiring diagram to identify the specific relay. The relay itself might be labeled, or you can use a multimeter to test relays if you have one.
* Inside the cab, under the dash: Less common, but possible on some models. This would usually be within an easily accessible fuse panel. Again, you'll need to consult your owner's manual or a wiring diagram for precise location.
To find it, I strongly recommend:
1. Consult your owner's manual: This is the best place to start. It will have a diagram of the fuse and relay boxes.
2. Use a wiring diagram: A wiring diagram specific to your year and model E-150 will show you the exact location of the fuel pump relay. You can often find these online through automotive repair websites or forums.
Without consulting these resources, blindly searching for the relay could lead to damaging other components. The diagrams will provide the best and safest way to locate it.
