Where is the fuel pump relay located on a Ford F-250?
The fuel pump relay on most Ford F-250 Super Duty trucks sits in the engine bay’s under-hood fuse/relay box (the Power Distribution Center). The exact slot can vary by year, so always check the diagram on the box lid to confirm the FUEL PUMP relay's position. This article outlines the typical spots and how to verify them.
Typical engine-bay location
This is the most common setup across recent and older F-250 models. Look in the engine bay power distribution center for the FP relay; the lid’s diagram will mark it clearly.
- Under-hood fuse/relay box (Power Distribution Center) on the driver’s side of the engine bay, usually near the firewall or the radiator support.
- Relay labeled “FUEL PUMP,” “FUEL PUMP RELAY,” or sometimes just “PUMP” on the box diagram.
- The FP relay is typically one of the standard 4- or 5-pin automotive relays in that block; confirm with the diagram to avoid swapping the wrong relay.
Knowing where to look in the engine bay saves time when diagnosing starting or fuel-delivery issues. If the lid diagram isn’t readable, tracing the wire from the fuel pump connector can also help identify the correct relay.
Alternative locations and year variations
Ford has used different layouts over the years. In some older or special configurations, the fuel pump relay may be located in interior fuse panels or the Integrated Power Module (IPM) under the dash, rather than in the engine bay box.
- Interior fuse panel (driver-side kick panel or under-dash) in certain older trucks or regional configurations.
- Integrated Power Module (IPM) or nearby dash area on some late-1990s to early-2000s models.
- For most modern 2005+ and all current Super Duty models, the FP relay remains in the engine-bay Power Distribution Center.
If you’re unsure, consult the owner’s manual or a Ford service manual for your exact year and trim to confirm the correct FP relay location and testing procedure.
How to verify you've found the right relay
Confirm the relay by cross-checking the diagram on the box lid, then, if you have a spare identical relay, swap it briefly to see whether starting or fuel delivery behavior changes. Ensure the engine is off and the battery is disconnected when handling relays, and reconnect everything securely after testing.
What to do if you still can’t locate it
If the FP relay remains elusive, take these steps:
- Refer to the exact year/model owner’s manual or Ford service manual for the precise diagram.
- Check VIN-specific wiring diagrams from Ford or reputable repair databases.
- Ask a mechanic or Ford dealership to identify the correct relay location for your configuration.
In short, for most Ford F-250s, the fuel pump relay is found in the under-hood fuse/relay box in the engine bay, with the diagram on the lid guiding you. Some older configurations relocate relays to interior fuse boxes or the IPM, so always verify with the year-specific manual or diagram.
