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Ford Focus · 2010

2010 Ford Focus Glow Plug Fuse & Relay

Diesel slow to start from cold, or the glow plug light flashing? Check the glow plug fuse and relay.

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

Partly covered: not every 2010 build range has been verified yet. Confirm against the legend on your fuse box.

Which 2010 Focus do you have?

The glow plug fuse & relay differs between versions of the 2010 Ford Focus. Until you choose, every possible result is shown.

Not sure which Focus you have?
  • Ford UK lists the 2010 Focus under more than one model name: Focus - B4 (C307 post-MCA) and Focus (2010). 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 - B4 (C307 post-MCA)”.
  • 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 - B4 (C307 post-MCA)

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

Glow plug

Fuse
6
Amperage
60A
Fuse box
Engine compartment
Location
In the engine compartment

Applies to: diesel only

Glow plug monitoring

Fuse
28
Amperage
10A
Fuse box
Engine compartment
Location
In the engine compartment

Applies to: diesel only

Quick answer

Verified

Option B Focus (2010)

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

No fuse is listed for this in this version. Check the legend on your fuse box.

Where is the fuse box?

Option A Focus - B4 (C307 post-MCA)

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 (2010)

Fuse box diagram

Full 2010 Ford Focus fuse chart

Option A Focus - B4 (C307 post-MCA)

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

  • 6

    In the engine compartment

    Fuse ·60A · Glow plug

    Position not shown on the schematic. Find fuse 6 on the fuse box legend.

  • 28

    In the engine compartment

    Fuse ·10A · Glow plug monitoring

    Position not shown on the schematic. Find fuse 28 on the fuse box legend.

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

Option B Focus (2010)

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.

  • Diesel engines only

    Glow plugs are only fitted to diesel engines. Petrol cars use spark plugs instead.

  • Flashing warning light

    A flashing glow plug (coil) light while driving usually means an engine fault code. Read the codes before replacing parts.

  • Worn plugs

    Glow plugs wear out. If starting is only poor in cold weather, one or more plugs may have failed rather than the fuse.

Sources & verification

Option A Focus - B4 (C307 post-MCA)

Status
Verified
Specification
UK market
Last checked
14 October 2026

Option B Focus (2010)

Status
Verified
Specification
UK market
Last checked
14 October 2026
  • Manufacturer manual listingFord UK — 2010 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 06/12/2010 Vehicles Built Up To: 07/03/2011) · Accessed 14 October 2026
  • Manufacturer manual listingFord UK — 2011 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 06/12/2010 Vehicles Built Up To: 07/03/2011) · Accessed 14 October 2026
  • Owner’s manualFord Focus (2010) Owner’s Manual — CG3568en, edition 09/2010 · Ford Motor Company · Fuse specification chart — Engine compartment fuse box (pp. 175–177); Fuse specification chart — Passenger compartment fuse box (pp. 179–180); Fuse specification chart — Load compartment fuse box (pp. 180–182) · Accessed 14 October 2026

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