Find a fuse

Ford Focus · 2018

2018 Ford Focus OBD Port Fuse

Code reader won’t power up? Check the fuse for the OBD diagnostic socket (Ford calls it the data link connector).

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources
Which 2018 Focus do you have?

The obd port fuse differs between versions of the 2018 Ford Focus. Until you choose, every possible result is shown.

Not sure which Focus you have?
  • Ford UK lists the 2018 Focus under more than one model name: Focus (2015), Focus RS (2015), Focus Electric (2015), Focus (2018) and Focus Vignale (2018). Their fuse layouts differ.
  • Ford UK’s Owner Manuals page can find your car’s handbook from its VIN. The page it opens is titled with Ford’s model name, for example “Focus (2015)”.
  • Your printed owner’s handbook, or a franchised dealer with your VIN, can also confirm it.

If you can’t confirm it, keep both results in mind and check the fuse box legend before removing anything.

Quick answer

Verified

Option A Focus (2015) or Focus RS (2015)

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources
Fuse
F73
Amperage
7.5A
Fuse box
Passenger compartment
Location
In the passenger compartment

Quick answer

Verified

Option B Focus Electric (2015)

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources

Data link connector.

Fuse
F31
Amperage
10A
Fuse box
Electric motor compartment
Location
In the electric motor compartment (under the bonnet)

Battery back-up sounder. On-board diagnostics system.

Fuse
F73
Amperage
7.5A
Fuse box
Passenger compartment
Location
In the passenger compartment

Quick answer

Verified

Option C Focus (2018) or Focus Vignale (2018)

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources

Data link connector.

Fuse
5
Amperage
10A
Fuse box
Engine compartment
Location
In the engine compartment

Steering wheel module. Instrument cluster. Data link connector.

Fuse
22
Amperage
7.5A
Fuse box
Passenger compartment
Location
Below the glove compartment

Where is the fuse box?

Option A Focus (2015) or Focus RS (2015)

Passenger compartment fuse box

In the passenger compartment

  1. Pinch the retaining clips to release the cover.
  2. Lower the fuse box cover and pull it towards you.

Option B Focus Electric (2015)

Electric motor compartment fuse box

In the electric motor compartment (under the bonnet)

  1. Lift the release lever at the rear of the cover to remove it.

Passenger compartment fuse box

In the passenger compartment

  1. Pinch the retaining clips to release the cover.
  2. Lower the fuse box cover and pull it toward you.

Option C Focus (2018) or Focus Vignale (2018)

Engine compartment fuse box

In the engine compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Passenger compartment fuse box

Below the glove compartment

  1. Fold back the carpet under the glove compartment.
  2. Carefully remove the cover.

Fuse box diagram

Full 2018 Ford Focus fuse chart

Option A Focus (2015) or Focus RS (2015)

We haven’t drawn a schematic of the passenger compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • F73

    In the passenger compartment

    Fuse ·7.5A · Data link connector. Battery back-up sounder.

    Position not shown on the schematic. Find fuse F73 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

Option B Focus Electric (2015)

We haven’t drawn a schematic of the electric motor compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the passenger compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • F31

    In the electric motor compartment (under the bonnet)

    Fuse ·10A · Data link connector.

    Position not shown on the schematic. Find fuse F31 on the fuse box legend.

  • F73

    In the passenger compartment

    Fuse ·7.5A · Battery back-up sounder. On-board diagnostics system.

    Position not shown on the schematic. Find fuse F73 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

Option C Focus (2018) or Focus Vignale (2018)

We haven’t drawn a schematic of the engine compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the passenger compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • 5

    In the engine compartment

    Fuse ·10A · Data link connector.

    Position not shown on the schematic. Find fuse 5 on the fuse box legend.

  • 22

    Below the glove compartment

    Fuse ·7.5A · Steering wheel module. Instrument cluster. Data link connector.

    Position not shown on the schematic. Find fuse 22 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

How to replace the fuse safely

  1. Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
  2. Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
  3. Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
  4. Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
  5. Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
  6. Refit the cover, switch on and test the component.
  • Never fit a fuse with a higher amperage rating than specified. It can let wiring overheat.
  • Never bridge a fuse with wire, foil or anything else.

Fuse keeps blowing?

A fuse that blows again straight away is doing its job. Something on that circuit is drawing too much current. Common causes are damaged wiring shorting to the bodywork, a failing motor or socket, water getting in, or a faulty accessory. Fitting fuse after fuse, or a bigger fuse, won’t fix the fault and can overheat the wiring. Have the circuit tested by an auto electrician.

Not the fuse? Check these next.

  • Ignition on

    Most scanners need the ignition on to talk to the car, even if they light up without it.

  • Scanner compatibility

    Some basic scanners can’t communicate with every car. Try another scanner before assuming a fault.

  • Bent pins

    Check the socket under the dashboard for bent or pushed-back pins.

Sources & verification

Focus (2015) · Built from 5 September 2016

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus RS (2015) · Built from 5 September 2016

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus Electric (2015) · Built from 16 January 2017

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus (2018) · Built up to 14 October 2018

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus (2018) · Built 15 October 2018 to 13 January 2019

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus Vignale (2018) · Built up to 14 October 2018

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus Vignale (2018) · Built 15 October 2018 to 13 January 2019

Status
Verified
Specification
UK market
Last checked
14 October 2026

Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.