* Under the hood in the Power Distribution Box (PDB): This is the most common location. The PDB is usually a large black box near the battery. The relay itself will be a small square or rectangular component within this box. You'll need to consult your owner's manual or a wiring diagram to identify the specific relay.
* Inside the passenger compartment fuse box: Less common, but possible on some models. This fuse box is usually located under the dashboard on the driver's side. Again, you'll need to consult your owner's manual or a wiring diagram.
To find the exact location:
1. Consult your owner's manual: This is the best resource. It should have a diagram of the fuse and relay boxes with the locations clearly marked.
2. Use a wiring diagram: A wiring diagram specific to your 2003 Ford Ranger will show the location of the fuel pump relay. You can find these online (many are free, but some require a subscription to a repair manual website).
3. Look for markings: Once you locate the fuse box(es), carefully examine the relays. Some may be labeled, while others might require referencing the diagram to ensure you've found the correct one.
Important Note: Working with the electrical system requires caution. Disconnect the negative battery terminal before working with any relays or fuses to prevent short circuits.
