Ford Fiesta · 2010
2010 Ford Fiesta Fog Light Fuse & Relay
Front fog lights not working? Check the fog light fuse and relay.
- UK specification
- Verified data
- Checked 14 October 2026
- Sources
Quick answer
VerifiedApplies toType 1 passenger fuse box · Built 1 August 2009 to 28 February 2010Type 2 passenger fuse box · Built 1 August 2009 to 28 February 2010Type 1 passenger fuse box · Built 1 March 2010 to 20 June 2010Type 2 passenger fuse box · Built 1 March 2010 to 20 June 2010Type 1 passenger fuse box · Built 21 June 2010 to 6 February 2011Type 2 passenger fuse box · Built 21 June 2010 to 6 February 2011
Front fog lamps
- Fuse
- 23
- Amperage
- 15A
- Fuse box
- Engine compartment
- Location
- In the engine compartment
Front fog lamps
- Relay
- R10
- Fuse box
- Engine compartment
- Location
- In the engine compartment
Where is the fuse box?
Engine compartment fuse box
In the engine compartment
Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.
Fuse box diagram
Full 2010 Ford Fiesta fuse chartWe 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
- 23
In the engine compartment
Fuse ·15A · Front fog lamps
Position not shown on the schematic. Find fuse 23 on the fuse box legend.
- R10
In the engine compartment
Relay · Front fog lamps
Position not shown on the schematic. Find relay R10 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
- Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
- Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
- Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
- Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
- Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
- 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
- With the ignition off, pull the relay straight out of its socket. Rock it gently if it is tight.
- Relays rarely look damaged when they fail. To test, swap in an identical relay with the same part number from a non-essential circuit.
- 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.
Headlights must be on
Front fog lights usually only work with the sidelights or dipped beam switched on.
Bulbs
If only one fog light is out, a blown bulb is far more likely than the fuse.
Water in the lamp
Fog lights sit low and can let water in. Corrosion in the lamp or its connector can stop them working.
Sources & verification
Applies toType 1 passenger fuse box · Built 1 August 2009 to 28 February 2010
- Manufacturer manual listingFord UK — 2009 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/08/2009 Vehicles Built Up To: 28/02/2010) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/08/2009 Vehicles Built Up To: 28/02/2010) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — 9V2J-19A321-ADA (CG3545en), edition 08/2009 · Ford Motor Company · Fuse box locations (p. 107); Fuse specification chart — engine compartment fuse box (pp. 108–110); Fuse specification chart — passenger compartment fuse box - Type 1 (pp. 110–111) · Accessed 14 October 2026
Applies toType 2 passenger fuse box · Built 1 August 2009 to 28 February 2010
- Manufacturer manual listingFord UK — 2009 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/08/2009 Vehicles Built Up To: 28/02/2010) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/08/2009 Vehicles Built Up To: 28/02/2010) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — 9V2J-19A321-ADA (CG3545en), edition 08/2009 · Ford Motor Company · Fuse box locations (p. 107); Fuse specification chart — engine compartment fuse box (pp. 108–110); Fuse specification chart — passenger compartment fuse box - Type 2 (pp. 112–114) · Accessed 14 October 2026
Applies toType 1 passenger fuse box · Built 1 March 2010 to 20 June 2010
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/03/2010 Vehicles Built Up To: 20/06/2010) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — AV2J-19A321-ADA (CG3545en), edition 12/2009 · Ford Motor Company · Fuse box locations (p. 113); Fuse specification chart — engine compartment fuse box (pp. 114–116); Fuse specification chart — passenger compartment fuse box - Type 1 (pp. 117–118) · Accessed 14 October 2026
Applies toType 2 passenger fuse box · Built 1 March 2010 to 20 June 2010
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 01/03/2010 Vehicles Built Up To: 20/06/2010) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — AV2J-19A321-ADA (CG3545en), edition 12/2009 · Ford Motor Company · Fuse box locations (p. 113); Fuse specification chart — engine compartment fuse box (pp. 114–116); Fuse specification chart — passenger compartment fuse box - Type 2 (pp. 119–122) · Accessed 14 October 2026
Applies toType 1 passenger fuse box · Built 21 June 2010 to 6 February 2011
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 21/06/2010 Vehicles Built Up To: 06/02/2011) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2011 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 21/06/2010 Vehicles Built Up To: 06/02/2011) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — AV2J-19A321-ADA (CG3545en), edition 03/2010 · Ford Motor Company · Fuse box locations (p. 115); Fuse specification chart — engine compartment fuse box (pp. 116–118); Fuse specification chart — passenger compartment fuse box - Type 1 (pp. 119–120) · Accessed 14 October 2026
Applies toType 2 passenger fuse box · Built 21 June 2010 to 6 February 2011
- Manufacturer manual listingFord UK — 2010 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 21/06/2010 Vehicles Built Up To: 06/02/2011) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2011 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 21/06/2010 Vehicles Built Up To: 06/02/2011) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — AV2J-19A321-ADA (CG3545en), edition 03/2010 · Ford Motor Company · Fuse box locations (p. 115); Fuse specification chart — engine compartment fuse box (pp. 116–118); Fuse specification chart — passenger compartment fuse box - Type 2 (pp. 121–124) · Accessed 14 October 2026
Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.