Ford Mustang Fuse Box: Location & Guide
TL;DR
The Mustang uses two fuse boxes (engine bay near the battery, and a driver-side interior panel) across every generation from 2005-on, no trunk box, with the definitive fuse map printed on each cover lid.
Where the Ford Mustang fuse boxes are located
Across every Mustang generation the layout is consistent: one power distribution box lives in the engine bay next to the battery, and one interior fuse panel sits behind a small door at the driver-side end of the dashboard, near where the door hinges meet the instrument panel. The Mustang coupe does not have a third fuse box in the trunk.
| Generation / years | Fuse box | Location | How to access |
|---|---|---|---|
| 2005-2014 (S197) | Engine compartment power distribution box | Driver's side of the engine bay, next to the battery | Release the plastic clips on the edge of the cover and lift it off |
| 2005-2014 (S197) | Passenger compartment fuse panel | Left edge of the instrument panel, behind a small hinged door | Pull the door open by hand, no tools needed |
| 2015-2023 (S550) | Engine compartment power distribution box | Driver's side of the engine bay, next to the battery | Unclip the retaining tabs around the cover and lift straight up |
| 2015-2023 (S550) | Interior fuse panel | Driver-side end of the instrument panel, near the door opening | Open the small trim cover by hand |
| 2024-present (S650) | Engine compartment power distribution box | Driver's side of the engine bay, next to the battery | Unclip the cover tabs and lift it off |
| 2024-present (S650) | Interior fuse panel | Driver-side end of the instrument panel | Open the small access door by hand |
Finding the official fuse legend
Do not rely on memorized fuse numbers, they change between trims, engines and model years. The reliable source is printed right on the inside of each fuse box lid as a diagram with a legend. The owner's manual has a dedicated chapter (usually titled Fuses or Fuse Specifications) that repeats the same diagram with the circuit each fuse protects, and it is the safest way to confirm the exact position and amperage for your specific car.
Fuses that commonly blow, by function
- Cigarette lighter / 12V power outlet: a very common failure because aftermarket phone chargers and accessories are left plugged in and draw a short. Symptom: the outlet stops charging devices while everything else works normally.
- Radio / infotainment (SYNC screen): when this fuse blows the touchscreen, backup camera feed and steering-wheel audio controls can all go dark at once.
- Interior lighting: covers the dome light, footwell lights and sometimes glovebox light; a blown fuse here leaves the cabin dark with no dash warning.
- Blower motor: when this fuse fails the climate control fan stops moving air entirely, even though the AC or heater still shows as on.
- Fuel pump relay/fuse: a blown fuse here is why the car cranks but will not start or stay running, since the fuel pump loses power.
How to check and replace a fuse safely
With the engine off, pull the suspect fuse straight out using the plastic fuse-puller tool clipped inside the box lid. Hold it up to the light: a good fuse has an intact thin metal strip inside; a blown one shows the strip visibly broken or the plastic body scorched. If it looks fine, a test light or multimeter across the two terminals confirms continuity. Always replace a blown fuse with one of the identical amp rating printed on the lid diagram, never a higher rating, since the fuse is sized to protect the wiring, not just the accessory.
When a fuse keeps blowing
A fuse that blows once can be a fluke, such as a surge from a plugged-in accessory. A fuse that blows repeatedly right after being replaced almost always means a short circuit or a failing component drawing excess current somewhere downstream, and simply installing a higher-rated fuse to make it stop is unsafe. In these cases, having the vehicle's stored diagnostic trouble codes read can point directly to the affected circuit and save hours of blind fuse-swapping.
Summary
| Fuse boxes per Mustang | 2 (engine bay + interior dash panel), no trunk box |
|---|---|
| Engine bay fuse box location | Driver's side, next to the battery |
| Interior fuse panel location | Driver-side end of the instrument panel, behind a small door |
| Official fuse legend source | Diagram printed on the inside of each fuse box cover, and the owner's manual fuse chapter |
| Most commonly blown fuses | 12V/cigarette lighter outlet, radio/SYNC, interior lights, blower motor, fuel pump |
| Fuse replacement rule | Match the exact amp rating printed on the lid, never go higher |
| Repeated blowing means | Likely a short circuit, get stored fault codes read before replacing again |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see Ford Mustang: Common Problems, Fault Codes & Repairs.
Frequently asked questions
Where is the fuse box on a Ford Mustang?
Every Mustang has two fuse boxes: an engine-compartment power distribution box on the driver's side next to the battery, and an interior fuse panel behind a small door at the driver-side end of the instrument panel. There is no third fuse box in the trunk on any Mustang generation.
How do I find out which fuse controls what on my Mustang?
Open either fuse box cover and look at its inside surface, it has a printed diagram and legend naming every fuse position and its circuit. The owner's manual chapter on fuses repeats the same diagram with circuit names, and is the most reliable source since numbering can differ by trim, engine and model year.
Why does my Mustang's cigarette lighter or 12V outlet fuse keep blowing?
This is one of the most common Mustang fuse failures, usually caused by an aftermarket phone charger, dash cam or accessory that draws too much current or has a shorted plug. If a fresh fuse of the correct amp rating blows again almost immediately, unplug all accessories from that outlet and have the circuit checked rather than fitting a higher-rated fuse.
Is it safe to put in a higher amp fuse if the original keeps blowing?
No. The amp rating is sized to protect the wiring harness for that circuit, not just the device plugged into it. A fuse that keeps blowing signals a short or an overloaded circuit, and fitting a higher rating can let excess current damage the wiring or create a fire risk. Have the fault diagnosed, reading stored trouble codes can quickly identify the affected circuit.