2015 Ford F-250 Super Duty Fuse Box Diagram & Amperage

Quick Answer

The 2015 Ford F-250 Super Duty typically has three main fuse box locations:

• Under-hood Fuse Box (Power Distribution Box) – Located in the engine compartment, usually near the battery on the driver's side.
• Passenger Compartment Fuse Box – Located behind the kick panel on the passenger side, near the floorboard.
• Rear Seat Power Distribution Box – Located under the rear seat on the driver's side.

Under-hood Fuse Box (Power Distribution Box)

The under-hood fuse box contains high-amperage fuses and relays for critical engine functions, lighting, and major electrical components. Refer to the diagram on the fuse box lid for exact locations, as configurations can vary slightly due to trim levels and optional equipment.

Relay Locations (Under-hood):

• R1 - Starter Relay
• R2 - Fuel Pump Relay
• R3 - PCM/ECM Power Relay
• R4 - Headlamp High Beam Relay
• R5 - Headlamp Low Beam Relay
• R6 - Blower Motor Relay
• R7 - A/C Clutch Relay
• R8 - Trailer Tow Charge Relay
• R9 - ABS Pump Relay

Passenger Compartment Fuse Box

This fuse box is located behind the kick panel on the passenger side, near the floorboard. It contains fuses for various interior electrical components and accessories. Always check your owner's manual or the label on the fuse box cover for the most accurate information specific to your vehicle's trim level.

Rear Seat Power Distribution Box

This fuse box is typically found under the rear seat on the driver's side and primarily handles power for rear accessories and optional equipment. Always consult your owner's manual or the fuse box lid for the definitive layout.

How to Test a Fuse

Testing a fuse is a straightforward process:

1. Safety First: Ensure the vehicle is turned off and the ignition key is removed before handling fuses.
2. Locate the Fuse Box: Refer to the Quick Answer section above to find the correct fuse box.
3. Identify the Suspect Fuse: Look at the fuse chart (either in this guide, your owner's manual, or on the fuse box lid) to determine which fuse protects the circuit that is experiencing an issue.
4. Remove the Fuse: Use the plastic fuse puller usually found in one of the fuse boxes (or a pair of small needle-nose pliers) to carefully extract the fuse.
5. Visually Inspect: For standard blade fuses, look at the small wire element inside. If it's broken or melted, the fuse is blown. For cartridge or maxi fuses, visual inspection might be harder, but a burnt smell or discoloration can be an indicator.
6. Use a Multimeter (Recommended):
   • Set your multimeter to the continuity setting (usually indicated by a speaker or diode symbol).
   • Touch the probes to the two metal test points on top of the removed fuse (without touching the fuse element itself). If the multimeter beeps or shows a reading close to zero ohms, the fuse is good. If there's no beep or it shows "OL" (Open Line), the fuse is blown.
7. Replace with Correct Amperage: If the fuse is blown, replace it with a new fuse of the exact same amperage rating and type. Using a fuse with a higher amperage can cause severe electrical damage or even a fire.

Common Blown Fuses on This Vehicle

On a 2015 Ford F-250 Super Duty, some fuses tend to blow more commonly due to the demanding nature of a work truck and the accessories often added. When diagnosing an issue, these are good places to start checking:

• Cigar Lighter / 12V Power Outlets (Passenger Compartment F2 - 20A): These often blow due to overcurrent from charging multiple devices or using high-power accessories. Always check what was plugged in recently.
• Trailer Brake Controller / Trailer Tow Battery Charge (Under-hood F15 - 30A, F14 - 20A): Issues with trailer wiring, shorts in the trailer itself, or overloading can frequently blow these fuses. Inspect trailer connections and wiring harnesses first.
• Blower Motor (Under-hood F8 - 40A): A failing blower motor or a blockage in the HVAC system forcing the motor to work harder can cause this fuse to blow. If this fuse blows frequently, consider having the blower motor and cabin filter inspected.
• Radio/Infotainment System (Passenger Compartment F1 - 15A): Aftermarket radio installations, shorts in wiring, or internal radio issues can lead to this fuse blowing. If you've recently installed or tampered with the radio, start your inspection there.
• Headlamps (Under-hood F9, F10, F11, F12 - 10A/15A): While less common, a short in the headlight circuit or a faulty bulb can occasionally cause these fuses to blow. If one headlight is out and the bulb is confirmed good, check the corresponding fuse.

Always remember to consult the printed legend on your fuse box cover and your vehicle's owner's manual for the most accurate and up-to-date information, as fuse configurations can vary by trim level and specific options.

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