Where is the fuse box in 2005 ford focus

The fuse panel is located below and to the left of the steering wheel by
the brake pedal. Remove the CD stowage box to access the fuses.
To remove a fuse, use the fuse puller tool provided on the power
distribution box cover located in the engine compartment.

Check fuse 47, it is a 20 Amp

Here is a link to your owners manual on PDF

http://www.motorcraftservice.com/pubs/content/~WO5FOC/~MUS~LEN/41/05focog4e.pdf

Most cars only have 2-3 Fuse boxes. And generally the locations are as follows:
Under the driver side dash, on the left side behind or even above the kick panel.
Open the driver side door, there may or may not be a tiny removable panel, fuse box may be behind there.
Same on Passenger side.
Behind the glovebox, useually the glovebox is pulled down further by finding a plastic or rubber tab that limits the glovebox's movement, and depressing the tab until ample clearance is made.
Under the hood, usually this is for engine-specific functions. (1-2) fuse boxes here.

But I found this by googling your question.
found on WikiAnswers.com
There are 2 fuse boxes one behind the glove box and one under the hood, a little black box on the right hand side of the engine as you are facing it. Fuse 47, a 15amp fuse is for the cigarette lighter..it's located behind the glove box which you can drop down for easy access. The "glove box" mentioned is the little utility box on the left side near the door.....Not the big main "glove box" on the right hand side.

For MKI you can find it here: Ford Focus Fuse box Years of production 1998 1999 2000 2001 2002 2003 2004...