Ford Focus · 2020
2020 Ford Focus Heated Windscreen Fuse & Relay
Heated front windscreen not clearing? Find every fuse and relay Ford lists for it.
- UK specification
- Verified data
- Checked 14 October 2026
- Sources
Quick answer
VerifiedApplies toFocus (2018) · Built 8 April 2019 to 18 August 2019Focus (2018) · Built 19 August 2019 to 26 April 2020Focus (2018) · Built from 27 April 2020Focus Vignale (2018) · Built 8 April 2019 to 18 August 2019Focus Vignale (2018) · Built 19 August 2019 to 26 April 2020Focus Vignale (2018) · Built from 27 April 2020
Windshield heated washer jets. Heated windshield relay.
- Fuse
- 77
- Amperage
- 10A
- Fuse box
- Engine compartment
- Location
- In the engine compartment
Left-hand heated windshield element.
- Fuse
- 78
- Amperage
- 40A
- Fuse box
- Engine compartment
- Location
- In the engine compartment
Right-hand heated windshield element.
- Fuse
- 79
- Amperage
- 40A
- 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 2020 Ford Focus 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
- 77
In the engine compartment
Fuse ·10A · Windshield heated washer jets. Heated windshield relay.
Position not shown on the schematic. Find fuse 77 on the fuse box legend.
- 78
In the engine compartment
Fuse ·40A · Left-hand heated windshield element.
Position not shown on the schematic. Find fuse 78 on the fuse box legend.
- 79
In the engine compartment
Fuse ·40A · Right-hand heated windshield element.
Position not shown on the schematic. Find fuse 79 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.
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.
Engine running
Heated windscreens usually only work with the engine running, because they draw a lot of current.
Only one side clears
If one half of the screen clears and the other doesn’t, check the fuse for that side first.
After a new windscreen
If the glass has been replaced, check the heating connectors at its edges were plugged back in.
Sources & verification
Applies toFocus (2018) · Built 8 April 2019 to 18 August 2019
- Manufacturer manual listingFord UK — 2019 Focus (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/04/2019 Vehicles Built Up To: 18/08/2019) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2020 Focus (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/04/2019 Vehicles Built Up To: 18/08/2019) · Accessed 14 October 2026
- Online owner’s manualFord Focus (2018) online Owner’s Manual (O108465) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Applies toFocus (2018) · Built 19 August 2019 to 26 April 2020
- Manufacturer manual listingFord UK — 2020 Focus (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 19/08/2019 Vehicles Built Up To: 26/04/2020) · Accessed 14 October 2026
- Online owner’s manualFord Focus (2018) online Owner’s Manual (O149419) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Applies toFocus (2018) · Built from 27 April 2020
- Manufacturer manual listingFord UK — 2020 Focus (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 27/04/2020) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2021 Focus (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 27/04/2020) · Accessed 14 October 2026
- Online owner’s manualFord Focus (2018) online Owner’s Manual (O175069) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Applies toFocus Vignale (2018) · Built 8 April 2019 to 18 August 2019
- Manufacturer manual listingFord UK — 2019 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/04/2019 Vehicles Built Up To: 18/08/2019) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2020 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/04/2019 Vehicles Built Up To: 18/08/2019) · Accessed 14 October 2026
- Online owner’s manualFord Focus Vignale (2018) online Owner’s Manual (O142368) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Applies toFocus Vignale (2018) · Built 19 August 2019 to 26 April 2020
- Manufacturer manual listingFord UK — 2019 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 19/08/2019 Vehicles Built Up To: 26/04/2020) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2020 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 19/08/2019 Vehicles Built Up To: 26/04/2020) · Accessed 14 October 2026
- Online owner’s manualFord Focus Vignale (2018) online Owner’s Manual (O165618) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Applies toFocus Vignale (2018) · Built from 27 April 2020
- Manufacturer manual listingFord UK — 2020 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 27/04/2020) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2021 Focus Vignale (2018) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 27/04/2020) · Accessed 14 October 2026
- Online owner’s manualFord Focus Vignale (2018) online Owner’s Manual (O196367) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box; Fuse specification chart — Trailer tow module fuse box (5-door and wagon) · Accessed 14 October 2026
Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.