
If you're looking to locate the fuel pump relay on a 2006 F350 diesel, there are a few things you should know. Firstly, the fuel pump relay is integral to the central junction box (CJB) or the under-dash fuse panel assembly, so it cannot be serviced separately. You can find the fuel pump relay inside the instrument panel relay box, under the hood in the fuse block, or by removing the radio and looking down and to the left for a small covered relay box. The fuel pump relay is typically labelled #302, and the fuel pump fuse is usually #40 (20A) located under the steering column. It's important to refer to the owner's manual for specific information, which can be downloaded for free from motorcraft.com or motorcraftservice.com.
| Characteristics | Values |
|---|---|
| Fuel pump relay location | Inside the instrument panel relay box/inside the hood fuse box/under the hood |
| Fuel pump relay | #302 |
| Fuel pump fuse | #40 (20A) under the steering column |
| HFCM fuse | #7 (30A) under the hood |
| Water separator and fuel pump location | Inside the frame on the driver's side, under the driver's seat area |
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What You'll Learn
- The fuel pump relay is #302, located in the fuse block under the hood
- The fuel pump fuse is #40 in the under-dash fuse panel
- The fuel pump relay is integral to the CJB (central junction box)
- The fuel pump relay is located inside the instrument panel relay box
- The relay is in the upper left, and removing the ashtray makes it more accessible

The fuel pump relay is #302, located in the fuse block under the hood
If you own a 2006 F350 Super Duty Turbo Diesel, the fuel pump relay is #302, located in the fuse block under the hood.
The fuel pump relay is located in the fuse block under the hood, on the onboard side. It looks like a black mini fuse with an arrow on it.
You can find the fuel pump relay by opening the hood and locating the fuse block. The relay is one of the small type relays and will have an arrow on it. It may be located in the upper left of the relay box, so you might find it easier to access if you remove the ash tray.
If you have the owner's manual for your truck, you can refer to it for more information. The fuse and relay info should be under "Roadside Emergencies" starting on page 207. You can also download the owner's manual for free from the motorcraftservice.com website.
It's important to note that the fuel pump relay is integral to the fuse box, so if it fails, you will need to replace the entire fuse box.
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The fuel pump fuse is #40 in the under-dash fuse panel
If you're looking for the fuel pump fuse in your 2006 F350 diesel, it's located in the under-dash fuse panel, which is sometimes called the central junction box or CJB. This box is integral to the under-dash fuse panel assembly. The fuel pump fuse is #40 and is rated for 20 amps.
The fuel pump relay, on the other hand, is located in the fuse block under the hood. It is also known as the HFCM (horizontal fuel conditioning module) and is #302. The HFCM fuse is #7 and can be found under the hood.
The owner's manual for your truck should have this information. If you don't have a physical copy, you can download one for free from the motorcraft website. It should be noted that the fuel pump fuse #40 may be for gasser trucks only.
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The fuel pump relay is integral to the CJB (central junction box)
The fuel pump relay is integral to the central junction box (CJB), which is the underdash fuse panel assembly. This means that it is not serviced separately from the CJB and, if the relay fails, the entire fuse box will need to be replaced. Downloadable owners' manuals are available for free online, which can provide further information on the fuse/relay.
The fuel pump relay is located inside the instrument panel relay box, under the hood, and is identifiable as a black mini fuse with an arrow on it. To access it, you will need to remove the radio and look in the dash down and to the left. The relay is located in the upper left of the relay box, and removing the ashtray can make it easier to access.
The fuel pump relay is different from the fuel pump fuse, which is also located in the under-dash fuse panel. The fuel pump fuse is rated for 20 amps and can be identified as fuse #40.
The fuel pump itself is located inside the frame on the driver's side, usually under the driver's seat area. It is part of the horizontal fuel conditioning module (HFCM) and is housed with the water separator filter. The whole assembly is typically replaced when the fuel pump fails.
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The fuel pump relay is located inside the instrument panel relay box
If you own a Ford F-Super Duty truck, the fuel pump relay is located inside the instrument panel relay box. This means that the relay is integral to the box, and if the relay fails, you will need to replace the entire fuse box.
To access the fuel pump relay, you will need to remove the radio and look in the dash area to the left. You will see a small covered relay box. After removing the cover, the fuel pump relay is located in the upper left corner, and it is one of the small type relays.
It is important to note that the fuel pump relay is not serviced separately from the fuse panel. Therefore, before replacing the panel, it is recommended to perform some testing. Downloadable owners' manuals and diagrams can be helpful resources for locating the fuel pump relay and understanding the fuse information, circuit colours, and locations.
Additionally, the fuel pump fuse is typically located in the under-dash fuse panel and is rated for 20 amps.
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The relay is in the upper left, and removing the ashtray makes it more accessible
If you're looking for the fuel pump relay on a 2006 F350 diesel, there are a few places it could be located. Firstly, it's important to distinguish between the fuel pump relay and the fuel pump fuse, as they are often located in different places. The fuel pump relay is typically located inside the vehicle, while the fuel pump fuse may be found under the hood or steering column.
According to some sources, the fuel pump relay on a 2006 F350 diesel is located inside the instrument panel relay box or the central junction box (CJB). This box is usually found under the dashboard, and the relay is integral to the box, meaning that if the relay fails, the entire fuse box may need to be replaced. In some cases, the relay may be located in the fuse block under the hood, but this is less common.
To access the fuel pump relay on your 2006 F350 diesel, you may need to remove the radio or dash panel. One specific set of instructions suggests that the relay is in the upper left of the relay box, and removing the ashtray makes it more accessible. This indicates that the relay box is located somewhere in the dash panel, which aligns with the information provided by other sources.
It's worth noting that the location of the fuel pump relay may vary slightly depending on the specific model and configuration of your F350 diesel. For example, the relay location may differ between the F250 and F350 models, or between different engine sizes such as the 6.0L and 7.3L diesel engines. Additionally, some sources mention that downloadable owner's manuals for Ford vehicles can be found online, which may provide more specific information for your particular vehicle.
In summary, the fuel pump relay on a 2006 F350 diesel is likely located inside the instrument panel relay box or the central junction box, which is typically found under the dashboard. Removing the radio or dash panel may be necessary to access the relay, and in some cases, the ashtray may need to be removed as well. For more specific information, it is recommended to refer to the owner's manual for your vehicle.
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Frequently asked questions
The fuel pump relay is #302, located in the fuse block under the hood.
The fuel pump relay info is under "Roadside Emergencies" starting on page 207 of the owner's manual.
It looks like a black mini fuse with an arrow on it.
Yes, the fuel pump relay is integral to the central junction box (CJB) or the under-dash fuse panel. You will need to replace the fuse box if the relay fails.











































