It is located above fan, which you will have to remove and remove glove box and shelf above.
Disconnect plug twist out very stiff, once removed i replaced with a much cheaper ford focus resistor for less than £10 you will need to cut off old connector and replace each wire with a 25 amp spade connector. Tape each connector to insulate each one to get the right colours for right speeds are as follows. Although the focus resistor is of a different shape it will work tape up with electrical tape to avoid any shorting out the resistor side completely, looking at back of resistor as follows you will have two fixing points one at bottom Left one middle right. So wiring top left Purple top right Red/white, Bottom left brown bottom right Red Yellow. Now place resistor back inside hole.
The 25 amp spade connectors purchased from Halfords.
Resistor from E-bay
All Done
Dave Hampson, December 2015