Ford Fiesta · 2008
2008 Ford Fiesta 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: this page shows Ford’s Fiesta (2008) data only. Ford UK also lists Fiesta (2002) owner’s manuals for 2008, which we haven’t verified yet. If your car is one of those, this chart may not apply — check your owner’s manual or fuse box legend.
Quick answer
VerifiedApplies toType 1 passenger fuse box · Built up to 4 January 2009Type 2 passenger fuse box · Built up to 4 January 2009
Glow plugs
- Fuse
- 8
- Amperage
- 60A
- Fuse box
- Engine compartment
- Location
- In the engine compartment
Glow plugs
- Relay
- R2
- 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 2008 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
- 8
In the engine compartment
Fuse ·60A · Glow plugs
Position not shown on the schematic. Find fuse 8 on the fuse box legend.
- R2
In the engine compartment
Relay · Glow plugs
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
- 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.
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
Applies toType 1 passenger fuse box · Built up to 4 January 2009
- Manufacturer manual listingFord UK — 2008 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built Up To: 04/01/2009) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2009 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built Up To: 04/01/2009) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — 9V2J-19A321-ADA (CG3545en), edition 05/2008 · Ford Motor Company · Fuse box locations (p. 104); Fuse specification chart — engine compartment fuse box (pp. 105–107); Fuse specification chart — passenger compartment fuse box - Type 1 (pp. 107–108) · Accessed 14 October 2026
Applies toType 2 passenger fuse box · Built up to 4 January 2009
- Manufacturer manual listingFord UK — 2008 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built Up To: 04/01/2009) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2009 Fiesta (2008) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built Up To: 04/01/2009) · Accessed 14 October 2026
- Owner’s manualFord Fiesta Owner’s Handbook — 9V2J-19A321-ADA (CG3545en), edition 05/2008 · Ford Motor Company · Fuse box locations (p. 104); Fuse specification chart — engine compartment fuse box (pp. 105–107); Fuse specification chart — passenger compartment fuse box - Type 2 (pp. 109–111) · Accessed 14 October 2026
Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.