To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. The manual will have a diagram showing the location of all relays and fuses.
2. Check the fuse box under the hood: Most often, the fuel pump relay is located in the under-hood fuse box. The box itself might have a diagram on the inside of the cover. Look for a diagram that shows the relays, and look for one labeled "Fuel Pump" or something similar. Sometimes it's labeled with a number instead of a name.
3. Check the fuse box inside the cab (if applicable): Some Ford Rangers may have a secondary fuse box inside the cabin, usually near the steering column or under the dashboard. Check this box as well if you can't find it under the hood.
4. Use a wiring diagram: If you can't find it visually, you'll need a wiring diagram specific to your year and model of Ford Ranger. These diagrams are available online (often through repair manuals) and show the location and function of all electrical components.
Without the year of your Ford Ranger, it's impossible to give a precise location. Providing the year will allow for a more accurate response.