Ford Mustang 2018 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 2018, 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.
Passenger compartment Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Not used. | |
| 2 | Power mirror memory module (driver side mirror). Memory seat module. | 7.5 |
| 3 | Driver console unlock. | 20 |
| 4 | Not used. | |
| 5 | Subwoofer amplifier. | 20 |
| 6 | Not used. | |
| 7 | Not used. | |
| 8 | Not used. | |
| 9 | Not used. | |
| 10 | Telematics. | 5 |
| 11 | Not used. | |
| 12 | Climate control module. | 7.5 |
| 13 | Gateway module. Steering column control module. Instrument cluster. | 7.5 |
| 14 | Electronic power module. | 10 |
| 15 | Gateway module. | 10 |
| 16 | Decklid release. | 15 |
| 17 | Battery backed sounder. | 5 |
| 18 | Intrusion sensor module. | 5 |
| 19 | Electronic power module. | 7.5 |
| 20 | Headlamp control module. | 7.5 |
| 21 | In-vehicle temperature and humidity sensor. Front camera. | 5 |
| 22 | Not used (spare). | 5 |
| 23 | Switches. Power windows. Rear-view mirror. | 10 |
| 24 | Central lock/unlock. | 20 |
| 25 | Vehicle dynamics module. | 30 |
| 26 | Right-hand front-window motor (power distribution module). | 30 |
| 27 | Amplifier. | 30 |
| 28 | Auxiliary body module. | 20 |
| 29 | Left-hand rear-window power. | 30 |
| 30 | Right-hand rear-window power. | 30 |
| 31 | Not used. | |
| 32 | Remote keyless entry. Multi-function display. SYNC. Global positioning system module. Gauges. | 10 |
| 33 | Audio head unit. | 20 |
| 34 | Run-start bus. | 30 |
| 35 | Not used (spare). | 5 |
| 36 | Auxiliary body module. | 15 |
| 37 | Heated steering wheel module. | 20 |
Power distribution box Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Not used. | |
| 2 | Not used. | |
| 3 | Electronic Fan 1. | 30 |
| 4 | Electronic Fan 3. | 40 |
| 5 | Automatic brake system pump. | 50 |
| 6 | Body control module. | 50 |
| 7 | Body control module. | 60 |
| 8 | Body control module. | 50 |
| 9 | Rear window defroster. | 40 |
| 10 | Blower motor. | 40 |
| 11 | Left-hand front window. | 30 |
| 12 | Driver seat. | 30 |
| 13 | Passenger seat. | 30 |
| 14 | Climate-controlled seat module. | 30 |
| 15 | Convertible top motor. | 20 |
| 16 | Not used. | |
| 17 | Convertible top motor. | 20 |
| 18 | Not used. | |
| 19 | Steering column lock relay. | 20 |
| 20 | Brake on-off switch. | 10 |
| 21 | Horn. | 20 |
| 22 | Powertrain control module relay. | 10 |
| 23 | Air conditioning clutch. | 10 |
| 24 | Voltage quality module. | 30 |
| 25 | Not used. | |
| 26 | Windshield wiper motor. | 25 |
| 27 | Not used. | |
| 28 | Automatic brake system valve. | 30 |
| 29 | Not used. | |
| 30 | Starter motor solenoid. | 30 |
| 31 | Not used. | |
| 32 | Latch relay coil. | 10 |
| 33 | Run/Start (except GT350). | 15 |
| 33 | Left-hand high-intensity discharge headlamps (GT350 only). | 20 |
| 34 | Exhaust valves. | 15 |
| 35 | Right-hand high-intensity discharge headlamps (GT350 only). | 20 |
| 36 | Alt sense. | 10 |
| 37 | Not used. | |
| 38 | Vehicle power 1. | 20 |
| 39 | Not used. | |
| 40 | Vehicle power 2. | 20 |
| 41 | Fuel injectors. | 15 |
| 42 | Vehicle power 3. | 15 |
| 43 | Not used. | |
| 44 | Vehicle power 4. | 15 |
| 44 | Ignition coils (GT350 only). | 30 |
| 45 | Not used. | |
| 46 | Differential pump. | 20 |
| 47 | Not used. | |
| 48 | Fuel pump #2. | 30 |
| 49 | Fuel pump. | 30 |
| 50 | Steering column lock relay. | |
| 51 | Not used. | |
| 52 | Horn relay. | |
| 53 | Cigar lighter. | 20 |
| 54 | Auxiliary power point. | 20 |
| 55 | Electronic fan 2. | 25 |
| 56 | Not used. | |
| 57 | Air conditioning clutch relay. | |
| 58 | Not used. | |
| 59 | Exhaust valves relay. | |
| 60 | Powertrain control module. | 5 |
| 61 | Not used. | |
| 62 | Anti-lock brakes run-start switch. | 5 |
| 63 | Not used. | |
| 64 | Electronic power assist steering. | 5 |
| 65 | Not used. | |
| 66 | Blind spot information system. Rear view camera. Air conditioning compressor relay coils. Vehicle dynamics module. | 5 |
| 67 | Not used. | |
| 68 | Headlamp leveling switch. | 10 |
| 69 | Auxiliary power point relay. | |
| 70 | Heated exterior mirrors. | 10 |
| 71 | Not used. | |
| 72 | Rain sensor module. | 5 |
| 73 | Not used. | |
| 74 | Mass air flow sensor. | 5 |
| 75 | Not used. | |
| 76 | Rear window defroster relay. | |
| 77 | Electronic cooling fan 2 relay. | |
| 78 | Run/Start relay. | |
| 79 | Not used. | |
| 80 | Windshield wiper relay. | |
| 81 | Starter motor solenoid relay. | |
| 82 | Powertrain control module relay. | |
| 83 | Not used. | |
| 84 | Not used. | |
| 85 | Not used. | |
| 86 | Not used. | |
| 87 | Not used. | |
| 88 | Not used. | |
| 89 | Electronic fan 1 relay. | |
| 90 | Differential pump relay. | |
| 91 | Electronic fan 3 relay. | |
| 92 | Blower motor relay. | |
| 93 | Fuel pump #2 relay. | |
| 94 | Fuel pump relay. |
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.