In most modern cars, the fuel pump fuse and its relay are located in the engine-compartment fuse box or, in some models, in a cabin fuse box. The exact spot varies by make, model, and year, so always check your owner’s manual or the diagram on the fuse box cover for the precise location.
Where to look first
These are the places technicians most often find the fuel pump fuse and relay. Use the diagram on the fuse box cover or in the manual to confirm the exact label and position.
- Engine bay (under-hood) fuse/relay box
- Interior fuse/relay box (often under the dash on the driver’s side or near the glove box)
- Rear fuse box or cargo-area fuse block (found on some trucks/SUVs)
- Near the fuel pump module in the tank (in-tank pumps are usually controlled by a relay/fuse in one of the main boxes rather than inside the tank itself)
Conclusion: Most vehicles place the fuel pump fuse and relay in the engine bay or cabin fuse blocks. Always verify with the diagram on the fuse box cover or your vehicle’s manual. If you’re unsure, contact the dealer or a qualified mechanic for your exact VIN.
How to identify the correct fuse and relay
Use these steps to locate and confirm the fuel pump’s fuse and relay, and to verify power flow to the pump when needed.
- Locate fuse blocks in the engine compartment and in the passenger compartment; look for labels such as “FUEL PUMP,” “FUEL PUMP RELAY,” or a pump icon on the fuse box diagram.
- Check the fuse rating (most are 10–20 amps; 15A is common).
- Inspect the relay’s appearance; replace if it looks burnt, cracked, or corroded.
- With ignition on (engine off), use a test light or multimeter to confirm voltage at the fuel pump connector when the relay should be closed.
- If you have a spare, swap the relay with a similar non-critical relay to test functionality, ensuring the replacement is the same type and amperage.
Conclusion: Following these steps helps you identify the correct fuel pump fuse and relay and diagnose simple issues. If the pump still won’t run after these checks, there may be wiring problems, a faulty pump, or ECU-related concerns requiring professional service.
Vehicle-specific tips
Under-hood fuse box
Most makes place the fuel pump fuse and relay here. Look for a diagram on the inside of the fuse box lid that lists “FUEL PUMP” or a related label. The box is usually near the battery or along the fender. Use the diagram to pinpoint the exact slot and the corresponding fuse or relay.
In-tank or rear fuse considerations
Some vehicles with in-tank pumps still rely on a main fuse/relay located in the engine bay or a rear fuse block. For vehicles with rear fuse boxes, the fuel pump components may be labeled differently or located in a separate block near the trunk or rear hatch. Accessing in-tank components can require lifting the rear seat or dropping the fuel sender assembly, so consult the manual and follow safety procedures (disconnect battery, relieve fuel pressure) before attempting any work.
Summary
The fuel pump fuse and relay are commonly found in the engine-compartment fuse box or in a cabin fuse box, but placement varies by vehicle. Always check the owner’s manual or the fuse box diagram for the exact location and labeling, and use careful testing to confirm power delivery to the pump. If you’re uncertain or the vehicle won’t start, seek assistance from a qualified technician to avoid damage or safety risks.