* Under the hood in the Power Distribution Box (PDB): This is the most common location. The PDB is usually located near the battery, often on the passenger side fender well. The relay itself might be labeled, but you might need to consult your owner's manual or a wiring diagram to be certain. The diagram should show the relay's position within the PDB and its markings.
* Inside the passenger compartment fuse box: Less common, but possible. This fuse box is usually located under the dashboard on the driver's side. Again, you'll need your owner's manual or a wiring diagram to pinpoint the correct relay.
To find it, you should:
1. Consult your owner's manual: This is the best place to start. It will have a diagram showing the location of all relays and fuses.
2. Look for a diagram online: Many websites and forums dedicated to Ford Explorers have diagrams and information on relay locations. Search for "2004 Ford Explorer fuel pump relay location."
3. Use a multimeter: If you're comfortable working with electronics, you can use a multimeter to test the relays in both boxes to find the one that controls the fuel pump. (Be extremely careful when working with electrical components).
Caution: Always disconnect the negative battery terminal before working with electrical components in your vehicle to prevent accidental shorts and injury.
