The F350 Super Duty is a heavy-duty truck that is known for its durability and reliability. However, just like any other vehicle, it is prone to having electrical problems that can be frustrating to diagnose, especially if you do not have the right information. One of the common issues that F350 Super Duty owners encounter is blown fuses.
If you are experiencing electrical issues with your F350 Super Duty, the first thing you should do is check the fuse box. However, if you do not have a fuse diagram, you might struggle to identify which fuse is blown, and this can be time-consuming and frustrating. In this article, we will provide you with a detailed F350 Super Duty fuse diagram to help you quickly identify which fuse is causing the problem and how to replace it.
What Is a Fuse?
A fuse is a small, thin wire that is designed to burn out when there is too much current flowing through it. The purpose of a fuse is to protect the electrical system of a vehicle from damage caused by electrical overloads. When a fuse burns out, it breaks the circuit and stops the flow of electricity to that particular component.
Each F350 Super Duty has a fuse box that contains various fuses that control different electrical components of the truck. The fuse diagram is a map that shows the location of each fuse and which electrical component it controls.
Where Is the Fuse Box Located?
The fuse box of an F350 Super Duty is located under the hood on the driver’s side. To access the fuse box, you need to open the hood and look for a black box with a removable cover. The cover usually has a diagram that shows the location and function of each fuse.
F350 Super Duty Fuse Diagram
Below is a detailed F350 Super Duty fuse diagram that shows the location and function of each fuse:
| Fuse Number | Function |
|---|---|
| F1.1 | Powertrain Control Module (PCM) |
| F1.2 | Trailer tow stop/turn relay fuse |
| F1.3 | Trailer tow battery charge relay |
| F1.4 | Trailer tow park lamp relay |
| F1.5 | Trailer tow tail lamp relay |
| F1.6 | Stop lamps switch |
| F1.7 | Back-up lamps switch |
| F1.8 | Blower motor relay |
| F1.9 | A/C clutch relay |
| F1.10 | Trailer tow battery charge relay |
| F1.11 | Electronic fan clutch |
| F1.12 | Engine control module (ECM) |
| F1.13 | Accessory delay relay |
| F1.14 | Trailer tow charge relay |
| F1.15 | Trailer tow right turn/stop lamp relay |
| F1.16 | Trailer tow left turn/stop lamp relay |
| F1.17 | Trailer tow reverse lamp relay |
| F1.18 | Trailer tow battery charge relay |
| F1.19 | Trailer tow right turn/stop lamp fuse |
| F1.20 | Trailer tow left turn/stop lamp fuse |
| F1.21 | Trailer tow backup lamp relay |
| F1.22 | Trailer tow right turn/stop lamp fuse |
| F1.23 | Trailer tow left turn/stop lamp fuse |
| F1.24 | Trailer tow battery charge relay |
| F1.25 | Trailer tow stop/turn relay fuse |
| F1.26 | Trailer tow backup lamp fuse |
| F1.27 | Trailer tow battery charge relay |
| F1.28 | Trailer tow battery charge relay |
| F1.29 | Trailer tow right turn/stop lamp relay |
| F1.30 | Trailer tow left turn/stop lamp relay |
| F1.31 (Diesel only) | Injector driver module (IDM) relay (Diesel only) |
| F1.32 (Diesel only) | Engine oil temperature (EOT) sensor (Diesel only) |
| F1.33 (Diesel only) | Turbocharger wastegate solenoid (Diesel only) |
| F1.34 (Diesel only) | Vehicle power 2 (Diesel only) |
| F1.35 (Diesel only) | Vehicle power 1 (Diesel only) |
| F1.36 (Diesel only) | Ignition switch (Diesel only) |
| F1.37 (Diesel only) | Engine control module (ECM) relay (Diesel only) |
| F1.38 (Diesel only) | Fuel heater (Diesel only) |
| F1.39 (Diesel only) | Idle up (Diesel only) |
| F1.40 (Diesel only) | Powertrain control module (PCM) relay (Diesel only) |
How to Replace a Blown Fuse
If you have identified which fuse is blown, you can replace it using the following steps:
- Turn off the ignition and remove the key from the ignition switch.
- Open the hood and locate the fuse box.
- Remove the cover of the fuse box.
- Identify the fuse that needs to be replaced.
- Using a fuse puller or a pair of pliers, gently pull the fuse out of its socket.
- Insert the new fuse into the socket.
- Replace the cover of the fuse box.
- Start the engine and check if the electrical component that was not working is now functioning correctly.
FAQ
Q: How do I know if a fuse is blown?
A: When a fuse is blown, you will notice that the electrical component that it controls will not work. You can also check the fuse by removing it from its socket and inspecting the wire to see if it is broken.
Q: How often should I check the fuses in my F350 Super Duty?
A: It is recommended that you check the fuses in your F350 Super Duty every six months to ensure that they are functioning correctly.
Q: Can I replace a blown fuse with a higher amp fuse?
A: No, you should always replace a blown fuse with the same amp rating to avoid damaging the electrical system of your F350 Super Duty.
Q: What should I do if I cannot identify which fuse is blown?
A: If you cannot identify which fuse is blown, you should consult the owner’s manual or take your F350 Super Duty to a qualified mechanic for diagnosis and repair.
Q: Can I drive my F350 Super Duty if a fuse is blown?
A: It is not recommended to drive your F350 Super Duty if a fuse is blown as it can cause further damage to the electrical system.
Q: How much does it cost to replace a blown fuse?
A: The cost to replace a blown fuse is relatively low, and most fuses can be purchased for less than $2. However, the cost of diagnosis and repair can vary depending on the extent of the electrical problem.
Conclusion
If you are experiencing electrical problems with your F350 Super Duty, the fuse box is a good place to start your diagnosis. With the detailed F350 Super Duty fuse diagram provided in this article, you should be able to quickly identify which fuse is blown and how to replace it. Remember always to replace a blown fuse with the same amp rating to avoid damaging the electrical system of your F350 Super Duty.
