Ford Mustang Mach-E 2021 Fuse Replacement
Having an electrical issue? It could be a blown fuse — an easy fix you can do yourself.
Follow the steps below to find and replace the fuse:
Step 1: Find the Fuse Box
In your Ford Mustang Mach-E 2021, the interior fuse box is typically located under the dashboard on the driver's side. Some vehicles also have an additional fuse box in the engine compartment. Check your owner's manual or the fuse box cover for the exact location.
Step 2: Identify the Corresponding Fuse
Below is the complete fuse list for your vehicle. Find the circuit that isn't working and note the fuse number and amperage.
BCM Fuse Box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Not used. | 5 |
| 2 | Not used. | 5 |
| 3 | Extended power module. | 10 |
| 4 | Multi-function display. | 10 |
| 5 | Not used. | 20 |
| 6 | Not used. | 10 |
| 7 | Passenger door module. | 30 |
| 8 | Not used. | 5 |
| 9 | Auto-dimming exterior mirror. | 5 |
| 10 | Extended power module. | 10 |
| 11 | Power liftgate. Hands-free liftgate actuation module. Telematics control unit module. | 5 |
| 12 | Anti-theft alarm. Keyless keypad switch. Front driver door activation switch. Rear driver door activation switch. | 5 |
| 13 | Not used. | 15 |
| 14 | Driver door module. | 30 |
| 15 | Not used. | 15 |
| 16 | Active suspension (GT). | 15 |
| 17 | SYNC. | 15 |
| 18 | Wireless accessory charging module. Driver status monitor. Front passenger door activation switch. Rear passenger door activation switch. | 7.5 |
| 19 | Headlamp switch pack. Bluetooth low energy module. Push button start. | 7.5 |
| 20 | Anti-theft alarm horn. | 10 |
| 21 | Gateway module. Climate control. Gearshift module. | 7.5 |
| 22 | Instrument cluster. Steering column control module. | 7.5 |
| 23 | Audio unit. | 20 |
| 24 | Not used. | 20 |
| 25 | Not used. | 30 |
Under Hood Fuse Box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Not used. | |
| 2 | Not used (spare). | 40 |
| 3 | Windshield wiper heater. | 15 |
| 4 | Not used (spare). | 40 |
| 5 | Not used. | |
| 6 | Not used. | |
| 7 | Not used. | |
| 8 | Not used. | |
| 9 | Not used. | |
| 10 | Not used. | |
| 11 | Powertrain control module. | 15 |
| 12 | Not used. | |
| 13 | AC electric compressor. Active grille shutter. Powertrain control module heater cooling pump. Powertrain control module heater shut off valve. | 15 |
| 14 | Secondary drive unit transmission oil pump (GT). | 15 |
| 15 | Not used. | |
| 16 | Battery charge control module. | 10 |
| 17 | Not used. | |
| 18 | Powertrain control module. | 10 |
| 19 | Brake system control module. | 10 |
| 20 | Charge port status indicator. | 5 |
| 21 | Front luggage compartment actuator relay coil. | 5 |
| 22 | Amplifier. | 20 |
| 23 | Rear driver side electronic door. | 20 |
| 24 | Not used. | |
| 25 | Left-hand enhanced headlamps. | 25 |
| 26 | Right-hand enhanced headlamps. | 25 |
| 27 | Keep alive power. | 5 |
| 28 | Front luggage compartment actuator relay coil. | 5 |
| 29 | DC/DC converter. | 5 |
| 30 | Not used. | |
| 31 | Electronic power assist steering. | 5 |
| 32 | Body control module. | 30 |
| 33 | Advanced driver assistance system. | 20 |
| 34 | Headlamp control module. | 10 |
| 35 | Heated steering wheel. | 15 |
| 36 | Primary hybrid powertrain control module. Auxiliary power distribution box. Secondary hybrid powertrain control module. | 10 |
| 37 | Horn. | 20 |
| 38 | Blower motor. | 40 |
| 39 | Not used. | |
| 40 | Not used. | |
| 41 | Amplifier. | 20 |
| 42 | Driver power seat. | 30 |
| 43 | Anti-lock brake system valves. | 40 |
| 44 | Auxiliary power distribution box. | 60 |
| 45 | Passenger power seat. | 30 |
| 46 | Not used. | |
| 47 | Not used. | |
| 48 | Not used. | |
| 49 | Anti-lock brake system pump. | 60 |
| 50 | Cooling fan. | 60 |
| 51 | Not used. | |
| 52 | USB port. | 5 |
| 53 | Not used. | |
| 54 | Not used. | |
| 55 | Heated seats. | 30 |
| 56 | Front luggage compartment module. | 20 |
| 57 | Data link connector. | 10 |
| 58 | Not used. | |
| 59 | Body control module. | 40 |
| 60 | Not used. | |
| 61 | Auxiliary power point. | 20 |
| 62 | Not used. | |
| 63 | Not used. | |
| 64 | Power liftgate. | 30 |
| 65 | Vehicle dynamics module. | 30 |
| 66 | Not used. | |
| 67 | Not used. | |
| 68 | Battery electronic control module. | 5 |
| 69 | Rear passenger side electronic door. | 20 |
| 70 | Not used. | |
| 71 | Auxiliary power point. | 20 |
| 72 | Rear window wiper. | 20 |
| 73 | Not used. | |
| 74 | Windshield wiper motor. | 30 |
| 75 | Not used. | |
| 76 | Heated rear window. | 30 |
| 77 | Not used. | |
| 78 | Front driver side electronic door. | 20 |
| 79 | Front passenger side electronic door. | 20 |
| 80 | Not used. | |
| 81 | Rear window washer pump. | 10 |
| 82 | Not used. | |
| 83 | Not used. | |
| 84 | Not used (spare). | 40 |
| 85 | Rain sensor. | 5 |
| 86 | Not used. | |
| 87 | Not used. | |
| 88 | Not used. |
Battery fuse box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Frunk (Front luggage compartment) | 20 |
| 2 | Frunk (Front luggage compartment) | 20 |
Step 3: Check the Fuse
Use the plastic fuse puller, typically found in the fuse box, to remove the fuse. Hold it up to a light source. If the metal filament inside is broken or charred, the fuse is bad and needs to be replaced.
Step 4: How to Get a Replacement
You can buy a replacement fuse at any auto parts store. Make sure you match the **amperage (A)** and **physical size** of the fuse exactly. For example, if you need a 20A fuse, get a 20A fuse.
Step 5: Replace the Fuse
Gently press the new fuse into the empty slot. You should feel a slight click when it's securely in place. Test the affected circuit to confirm it's working again.
What Now?
Fuse Was Blown — What to Buy
Ask at any auto parts store (AutoZone, O'Reilly, Advance Auto) for a blade fuse with the same amperage printed on the old one (e.g., 10A, 15A, 20A). Also match the physical size — mini (most modern cars), standard, or maxi. Replacement fuses cost under $5 and most stores sell assorted packs.
Fuse Looks Fine — Other Causes
If the fuse is intact, the problem isn't a blown fuse. Common alternatives include a bad relay (a click-sized electrical switch), a faulty wiring connection, or a failed component (motor, switch, module). At this point, a mechanic's diagnostic is the most reliable next step.
Frequently Asked Questions
What happens if I put in the wrong amperage fuse?
Higher amperage fuses won't protect the circuit and can cause wiring damage or fire. Lower amperage fuses will blow again immediately. Always match the exact amperage.
Why does my fuse keep blowing?
A repeatedly blown fuse indicates an underlying short circuit or overload. Replacing it again won't fix the root cause — consult a mechanic.
Do I need any tools?
Most cars come with a plastic fuse puller in the fuse box lid. If not, fine-tip needle-nose pliers work. A small flashlight helps.
How do I know what size fuse to buy?
Match the amperage printed on the old fuse (e.g., 10A, 15A, 20A) and the physical blade size (mini, standard, maxi). Auto parts stores carry assorted packs.