Fiat Mobi Fuse Box: Location & Guide
TL;DR
The Mobi uses an engine-bay fuse/relay box plus a driver-side interior fuse panel; always read the amp values from the printed diagram on each box's own lid, since exact position numbers vary by trim, model year, and options fitted.
Where the Fiat Mobi fuse boxes are located
Every Fiat Mobi built since its 2016 launch uses a two-box layout typical of small Fiat/Stellantis hatchbacks for the Latin American market. The engine-bay box sits at the back of the engine compartment, usually near the battery or the bulkhead, and houses the higher-current fuses and most relays (fuel pump, cooling fan, horn, headlights). The interior box is mounted low on the dashboard to the left of the steering column, protected by a small plastic panel that either unclips by hand or slides out after releasing one or two tabs; it covers cabin circuits such as the radio, interior lighting, power windows (where fitted), and the instrument cluster.
How to open each box
The engine-bay cover is usually held by plastic clips around its edge or a quarter-turn fastener at the center; pull straight up evenly to avoid snapping a tab. The interior panel near the driver's knee typically pops off by pulling from a bottom edge, or you may need to open the small door built into the dash end. Never pry with excessive force in one spot only - work around the edges.
Fuse legend and lid diagram
Fiat prints the fuse map directly on the inside face of each box lid, showing every position with an icon or abbreviation for the circuit it protects and the amperage rating (color-coded per fuse). This lid diagram is the manufacturer's own reference for that exact car and always takes priority over generic charts, since running changes between model years and engine/trim combinations can shift which position controls which circuit. The owner's manual repeats the same legend in its electrical section and also explains how to access each box.
Commonly blown fuses and their symptoms
- Cigarette lighter / 12V accessory outlet: a blown fuse here means the outlet stops charging phones or powering accessories while everything else works normally - a very common failure since aftermarket chargers and inverters are frequently left plugged in.
- Radio / infotainment: loss of power to the head unit, a blank screen, or the display resetting each time the car starts often points to this fuse or a poor ground at the unit itself.
- Interior lighting: dome light, dashboard illumination, or footwell lights failing together usually traces to one shared interior-lighting fuse.
- Blower motor (HVAC fan): if the climate control panel lights up but no air moves from any vent at any fan speed, the blower fuse (or the blower motor resistor circuit) is a prime suspect.
- Fuel pump relay/fuse: a car that cranks but will not start, or that stalls and refuses to restart, can point to this fuse or its relay - always check this circuit before condemning the pump itself.
How to check and replace a fuse safely
Turn off the ignition first. Pull the suspect fuse straight out with the plastic fuse-puller tool usually clipped inside the box lid, and inspect the thin metal strip inside the transparent body: a blown fuse shows a visibly broken or melted strip. If it looks intact but you still suspect it, a simple 12V test light or multimeter across the two prongs confirms continuity. Always replace with a fuse of the identical amperage printed on the lid diagram - never a higher rating, since that removes the protection the circuit was designed with and risks wiring damage or fire.
When a fuse keeps blowing
A fuse that blows again immediately or within minutes of replacement is not a fluke - it almost always signals a short circuit or an overloaded component downstream on that circuit, not a weak fuse. Continuing to install ever-higher-rated fuses to make the symptom go away is unsafe. At this point a stored diagnostic trouble code from the vehicle's body control module or engine control unit is often the fastest way to narrow down which component or wiring section is at fault, since many electrical shorts trigger a related fault code even when the check-engine light itself stays off.
| Generation / years | Fuse box | Location | How to access |
|---|---|---|---|
| 1st gen (2016-present) | Engine-bay power distribution box | Rear of engine bay, near battery/bulkhead | Unclip or unlatch the plastic cover; lift straight up |
| 1st gen (2016-present) | Interior fuse panel | Dash, left of steering column near driver's knee | Pull off small trim cover or open dash end-cap door |
Summary
| Model years covered | 2016-present (1st generation) |
|---|---|
| Number of fuse boxes | 2 (engine bay + interior) |
| Engine-bay box location | Rear of engine compartment, near battery/bulkhead |
| Interior box location | Dash, left of steering column, near driver's knee |
| Official fuse legend | Printed diagram on each box's own lid + owner's manual electrical chapter |
| Most commonly blown fuses | 12V/cigarette lighter outlet, radio, interior lights, blower motor, fuel pump relay |
| Repeated blowing means | Likely short circuit downstream - scan for stored fault codes rather than upsizing the fuse |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see Fiat Mobi: Common Problems, Fault Codes & Repairs.
Frequently asked questions
Where is the fuse box on a Fiat Mobi?
The Fiat Mobi has two fuse boxes: one in the engine bay near the battery/bulkhead that holds the higher-current fuses and most relays, and one inside the cabin to the left of the steering wheel near the driver's knee, covered by a small removable trim panel, which holds the fuses for interior circuits like the radio and lighting.
How do I find out which fuse controls a specific circuit on my Mobi?
Open the fuse box cover and look at the printed diagram on the underside of the lid itself - Fiat labels every position with an icon or abbreviation and its amperage directly on the cover. The owner's manual repeats this same legend, and it is more reliable than any generic online chart because exact positions can differ by model year and trim.
Why does my Fiat Mobi's cigarette lighter or 12V outlet stop working?
This is almost always a blown fuse dedicated to the accessory outlet, commonly caused by a faulty phone charger, inverter, or other accessory drawing too much current. Check the fuse against the lid diagram, test it with a test light, and replace with the identical amperage if blown; if it blows again right away, there is likely a short in an accessory or its wiring.
What does it mean if a fuse on my Mobi keeps blowing repeatedly?
A fuse that blows again shortly after replacement points to a short circuit or an overloaded component on that circuit rather than a bad fuse, and installing a higher-amperage fuse to stop it from blowing is unsafe and can damage wiring. Have the vehicle scanned for stored fault codes, since they frequently pinpoint the faulty component or wiring section causing the short.