Find a fuse

Ford Focus · 2017

2017 Ford Focus Horn Fuse

Horn silent when you press the pad? Check the fuse that protects it first.

  • 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 horn 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.

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

Horn.

Fuse
F20
Amperage
15A
Fuse box
Engine compartment
Location
In the engine compartment

Horn.

Relay
R2
Fuse box
Engine compartment
Location
In the engine compartment

Quick answer

Verified

Option B Focus Electric (2015)

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

Horn.

Fuse
F20
Amperage
15A
Fuse box
Electric motor compartment
Location
In the electric motor compartment (under the bonnet)

Horn.

Relay
R2
Fuse box
Electric motor compartment
Location
In the electric motor compartment (under the bonnet)

Where is the fuse box?

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

Engine compartment fuse box

In the engine compartment

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

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.

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 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.

Where to look

  • F20

    In the engine compartment

    Fuse ·15A · Horn.

    Position not shown on the schematic. Find fuse F20 on the fuse box legend.

  • R2

    In the engine compartment

    Relay · Horn.

    Position not shown on the schematic. Find relay R2 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.

Where to look

  • F20

    In the electric motor compartment (under the bonnet)

    Fuse ·15A · Horn.

    Position not shown on the schematic. Find fuse F20 on the fuse box legend.

  • R2

    In the electric motor compartment (under the bonnet)

    Relay · Horn.

    Position not shown on the schematic. Find relay R2 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.

Checking the relay

  1. With the ignition off, pull the relay straight out of its socket. Rock it gently if it is tight.
  2. Relays rarely look damaged when they fail. To test, swap in an identical relay with the same part number from a non-essential circuit.
  3. If the fault moves to the other circuit, replace the relay. If it doesn’t, the problem is elsewhere.

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.

  • Horn unit itself

    Horns sit at the front of the car, exposed to water and road salt. A corroded horn or connector is a common cause.

  • Steering wheel contact

    The horn pad connects through a contact inside the steering wheel. If the horn works only at some wheel positions, that contact may be worn.

  • Shared fuse

    If other items on the same fuse have also stopped, suspect the fuse or its supply rather than the horn.

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.