If you problem is with a Mk3 fiesta you will probably find its the controlling relay for heated window as over time this gets hot and melts? it just a case of renewing it. It is located behind fuse box inside car.
On a MK5 Ford Fiesta, the heated front screen relay is typically located in the engine compartment fuse box. You can find the fuse box near the battery, usually on the driver's side. To identify the relay for the heated front screen, refer to the diagram on the fuse box cover or the owner's manual, as it will indicate the specific position. Always ensure the vehicle is off before attempting to access any electrical components.
The 2012 Ford Fiesta has 42.2 in. of front leg room.
The 2014 Ford Fiesta has 50.6 in. of front hip room.
The 2013 Ford Fiesta has 52.7 in. of front shoulder room.
The 2011 Ford Fiesta has 42.2 in. of front leg room.
The 2014 Ford Fiesta has 39.1 in. of front head room.
The 2013 Ford Fiesta has 42.2 in. of front leg room.
The 2013 Ford Fiesta has 50.6 in. of front hip room.
The 2011 Ford Fiesta has 39.1 in. of front head room.
The 2013 Ford Fiesta has 39.1 in. of front head room.
The 2014 Ford Fiesta has 42.2 in. of front leg room.
The 2012 Ford Fiesta has 50.6 in. of front hip room.