Find a fuse

Ford Focus · 2017

2017 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

Partly covered: Ford UK lists two Focus Electric (2015) handbooks for 2017 whose build dates overlap but whose fuse charts differ, and doesn’t say which applies to cars built in the overlap. Both are shown below — where they differ, compare the legend in your fuse box before removing anything.

Which 2017 Focus do you have?

The obd port fuse differs between versions of the 2017 Ford Focus. Until you choose, every possible result is shown.

Not sure which Focus you have?
  • Ford UK lists the 2017 Focus under more than one model name: Focus (2015), Focus RS (2015) and Focus Electric (2015). 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.
  • Many cars carry a manufacturer’s label (often called the VIN plate) that can show the build or production date. It is commonly on a door pillar, under the bonnet or at the base of the windscreen, but the exact place varies.
  • Your owner’s handbook, service record or original sales paperwork may show the build date or specification.
  • The first registration date on your V5C logbook is not the build date. Cars are often built weeks or months before they are registered, so it is only a rough guide near a changeover.
  • A franchised dealer can usually confirm the build date and specification from your VIN.
  • Still unsure? Compare the legend on your fuse box cover with each option.

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) · Built from 8 September 2014

  • 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 (alarm system). Onboard diagnostics system.

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

Quick answer

Verified

Option C Focus Electric (2015) · Built from 16 January 2017

  • 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

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) · Built from 8 September 2014

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 Electric (2015) · Built from 16 January 2017

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.

Fuse box diagram

Full 2017 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) · Built from 8 September 2014

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 (alarm system). Onboard 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 Electric (2015) · Built from 16 January 2017

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.

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 20 July 2015

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus (2015) · Built from 5 September 2016

Status
Verified
Specification
UK market
Last checked
14 October 2026

Focus RS (2015) · Built from 20 July 2015

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 8 September 2014

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

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