Fiat Uno (1983-2002) was manufactured with several different electrical installations. Early carburetted Uno models, later FIRE and fuel-injected versions, and the 1301/1372 Turbo i.e. use different fuse assignments and supplementary holders. Uno production in Poland from 1994 to 2002 does not mean all Polish-built cars share the wiring of an Italian-market car from the same year.
These six complete tables reproduce all 53 positions and reference entries from the Polish source, including four unused late-panel cavities, the different early and late A-E/A-G auxiliary fuse schemes, three extra unnumbered ABS/lambda fuses and five relay functions. The source is based on the petrol-engine 903, 999, 1108, 1116, 1299/1301 and 1372 cc descriptions in the Haynes Fiat Uno workshop manual, Chapter 13. It is not a verified diesel fuse chart.
Where are the fuse and relay boxes in the Fiat Uno?
Main interior fuse box: with ignition off, sit in the driver’s seat of a left-hand-drive Uno and locate the lower dashboard carrier on the left side beneath the instrument panel. Undo the two thumb-operated retaining screws and carefully swing the carrier down towards you. Read the numbering on its actual cover or fuse housing, since early and late versions differ. Do not remove the wiring connectors or tug on the harness to reach a fuse.
Auxiliary equipment: front electric windows, central locking, fuel injection and turbocharged engines can have extra fuses at the side of the main interior carrier and relay brackets elsewhere under the dashboard. The hazard/flasher unit is close to the lower steering-column switch assembly and should not be confused with an auxiliary relay numbered 3.
Turbo i.e. engine equipment: the injection-system fan, electric fuel pump, cooling fan and their separate fuses and relays can be located on additional brackets under the bonnet or near the central carrier. The actual arrangement depends on 1301 or 1372 engine type, as well as model year. Keep the supplemental A-E and A-G letter schemes separate.
Earlier Uno fuse reference – 14 archived entries
The older Polish source’s 14-entry summary assigns position 9 (20 A) to rear-window heating, position 10 (10 A) to indicators, stop and reversing lights, and position 6 (10 A) to the cigarette lighter. It marks position 13 unused and position 14 as hazard-warning protection. These assignments refer to that archived early list and must be checked against the vehicle’s physical fuse card.
Important source distinction: the comprehensive Haynes manual also describes a 15-active-fuse variant with additional positions for front fog lamps and horn. Its numbers 13, 14 and 15 cannot be applied automatically to a vehicle identified only from the 14-entry summary. The archive picture provided in the Polish article depicts a 19-position panel, so it is placed under the matching later section instead of being presented as a verified 14-slot diagram.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 7.5 | Left rear tail lamp, right front parking lamp, number plate illumination and check-control panel |
| 2 | 7.5 | Right rear tail lamp, left front parking lamp, lighter/clock backlights, heater control illumination and map-reading lamp |
| 3 | 10 | Right high-beam headlamp |
| 4 | 10 | Left high-beam headlamp and blue high-beam indicator |
| 5 | 25 | Radiator cooling fan, fuel-economy gauge and horn |
| 6 | 10 | Cigarette lighter / 12 V socket, interior courtesy lamps, clock, brake switch and radio |
| 7 | 10 | Right dipped-beam headlamp |
| 8 | 10 | Left dipped-beam headlamp and rear fog telltale |
| 9 | 20 | Heated rear window and demister warning indicator |
| 10 | 10 | Instrument cluster, stop lamps, indicators, reversing lights and check-control unit |
| 11 | 20 | Heater and ventilation blower, heater control and clock illumination |
| 12 | 20 | Front windscreen wiper and washer, rear wiper/washer if fitted |
| 13 | – | Unassigned spare position in the archived 14-entry version |
| 14 | 10 | Hazard warning flashers and their warning lamp in the archived 14-entry version |
Later Uno petrol fuse box – 19 physical positions
The later main board has 15 documented active fuses plus four spare positions numbered 16-19. Here the functions of positions 9 and 10 have changed: 9 (10 A) controls the rear fog lamp, while 10 (20 A) protects the heated rear window. Position 11 (10 A) handles instruments, stop lights and indicators, position 12 (20 A) the heater fan, position 13 (20 A) front and rear wipers, and position 15 (10 A) the hazard flashers. The cigarette lighter remains on position 6 (10 A).
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 7.5 | Left rear tail lamp, right front parking lamp, number plate lights and check-control panel |
| 2 | 7.5 | Right rear tail lamp, left front parking lamp, lighter/clock backlight, heater control lights and map-reading lamp |
| 3 | 10 | Right high-beam headlamp |
| 4 | 10 | Left high-beam headlamp and warning telltale |
| 5 | 25 | Engine radiator cooling fan except Turbo i.e., and horn |
| 6 | 10 | Cigarette lighter/12 V socket, courtesy lamps, clock, brake switch and radio |
| 7 | 10 | Right dipped-beam headlamp |
| 8 | 10 | Left dipped-beam headlamp |
| 9 | 10 | Rear fog lamp and warning telltale |
| 10 | 20 | Heated rear window and associated indicator |
| 11 | 10 | Instrument cluster, stop lamps, direction indicators, reversing lights, check control and FIRE carburettor idle cut-off |
| 12 | 20 | Heater blower and heater/digital clock illumination |
| 13 | 20 | Front wipers and washer; rear wiper/washer if fitted |
| 14 | 20 | Horns and horn relay |
| 15 | 10 | Hazard warning flashers and telltale |
| 16 | – | Unused spare location in this 19-position drawing |
| 17 | – | Unused spare location in this 19-position drawing |
| 18 | – | Unused spare location in this 19-position drawing |
| 19 | – | Unused spare location in this 19-position drawing |
Early auxiliary fuses A-E, including 1301 Turbo i.e.
The supplementary A-E holder is separate from the 14/19-row main panel. A (20 A) covers optional front fog lamps, B (30 A) the Turbo radiator cooling fan, C (10 A) an auxiliary fuel injector cooling fan, D (30 A) electric windows and E (10 A) the Turbo fuel pump. Do not transfer these letter codes to the later A-G holder, where A and B have different functions.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| A | 20 | Front fog lamps, if fitted – earlier supplemental A-E carrier |
| B | 30 | Radiator cooling fan on Uno 1301 Turbo i.e., separate high-current fuse |
| C | 10 | Fuel injector cooling fan on 1301 Turbo i.e. |
| D | 30 | Electric door windows |
| E | 10 | Electric petrol fuel pump on 1301 Turbo i.e. |
Later Uno supplementary fuses A-G
On later versions A (30 A) is the electric window supply, B (25 A) the optional central locking, C (10 A) injector cooling, D (20 A) headlamp washers and E (20 A) front fog lamps. F is a spare slot and G (10 A) protects the fuel pump on fuel-injected petrol vehicles. A separate detailed physical diagram of this later A-G strip was not present in the original, so the table does not invent a location for its individual sockets.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| A | 30 | Electric windows – later supplemental A-G carrier |
| B | 25 | Central door locking, if fitted |
| C | 10 | Fuel injector cooling fan, on equipped versions |
| D | 20 | Headlamp washer pump, optional |
| E | 20 | Front fog lamps and fog lamp telltale |
| F | – | Unoccupied spare position on later A-G list |
| G | 10 | Electric fuel pump on fuel-injected petrol engines |
Additional unnumbered lambda and ABS fuses
The Haynes workshop listings include a 10 A oxygen/lambda sensor heater fuse and, on equipped vehicles, separate 10 A ABS monitoring and 25 A ABS power protection near the steering-column relay bracket. The factory extract does not assign letter or numeric fuse codes to these entries. The U1-U3 markers in the first column below are reference labels used only to distinguish rows here, not moulded Fiat slot numbers.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| U1 | 10 | Heated lambda/oxygen sensor, supplemental unnumbered 10 A fuse |
| U2 | 10 | Anti-skid / ABS monitoring circuit, 10 A fuse on steering-column relay bracket if equipped |
| U3 | 25 | Anti-skid / ABS power supply, 25 A fuse on steering-column relay bracket if equipped |
Uno 1301 Turbo i.e. auxiliary relays 1-5
The 1301 Turbo i.e. service illustration identifies relay 1 as the horn, 2 as the heated rear window, 3 as the optional front fog lamps, 4 as the engine radiator cooling fan, and 5 as the electric-window relay. This corrects the older Polish article’s inaccurate reference to the heater cabin blower at relay 4. The relay drawing also shows the adjacent auxiliary A-E fuse bank and should not be used to identify unrelated late-model A-G positions.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | – | 1 – horn relay, Uno 1301 Turbo i.e. auxiliary relay drawing |
| 2 | – | 2 – heated rear-window demister relay |
| 3 | – | 3 – front fog lamp relay, if fitted |
| 4 | – | 4 – radiator cooling fan relay in the Turbo i.e. service drawing, not the cabin heater blower |
| 5 | – | 5 – electric windows relay |
Engine, model year and Polish production variations
Haynes lists the early 903, 999, 1116 and 1299/1301 petrol engines and, for later equipment, 903, 999, 1108 FIRE and 1372 injection/Turbo systems. Fiat Uno sold in Poland between 1994 and 2002 had several versions and trim/electrical updates. A late registration date therefore does not guarantee the 19-cavity arrangement or every supplementary A-G fuse. The separate high-current pump and injection circuits are particularly relevant on Turbo i.e. cars.
The Fiat Punto II (1999-2003) is a different-generation model with a dashboard F12-F53 system. The contemporary Fiat Marea (1996-2002) likewise uses different relay and fuse layouts, so neither can replace Uno’s 14/19-position charts.
Common Uno electrical symptoms and what to check
Cigarette lighter or clock not working: in both documented early and late reference lists, check main fuse 6 (10 A) as well as socket wiring. Lighter backlighting is a different circuit under fuse 2 (7.5 A), which can fail without interrupting the 12 V socket.
Rear window will not demist: check fuse 9 (20 A) on the old 14-entry list or fuse 10 (20 A) on the later 19-position carrier, followed by the demister relay and tailgate heating terminals. Rear fog lamp failed: in the later configuration fuse 9 (10 A) controls it; in the older reference rear-fog warning lighting appears with the left dipped-beam circuit.
Wipers stopped: on the earlier list check fuse 12 (20 A); on the later list check fuse 13 (20 A), then test the switch and wiper motor. Heater blower dead: early fuse 11 (20 A), or later fuse 12 (20 A), and the fan-speed switch are starting points.
Uno Turbo overheats because the fan does not start: inspect the early supplementary fuse B (30 A), the radiator cooling fan relay 4 and the fan thermostat and wiring. Turbo fuel pump silent: inspect supplementary E (10 A) on the early A-E version, or G (10 A) on the applicable later A-G scheme; verify the exact injection setup before testing relays.
Electric windows and central locking fail: the older supplemental D (30 A) covers windows, while the later A (30 A) covers windows and B (25 A) central locking. ABS warning on equipped models: inspect the separately mounted 10/25 A anti-skid fuses and then use the appropriate diagnostics; ordinary Uno versions without ABS do not have these circuits.