Hi hope someone can help me on this. I have a 2011 mk3 Ford Focus estate Titanium and the 12v socket in boot doesn’t work only found this out when wanted to plug 12v cooler box into it for a trip. Have tested fuse in passenger side footwell and it’s good tested the power to socket and nothing. Does it run on same fuse as ones in front and rear of vehicle or is it on separate fuse as the other two in front and rear work? Thanks in advance ! 

Hi Dave, have you checked the back of the socket to make sure the wiring harness is connected and the the plug hasn't come off ?

Yes have tested the socket with a multimeter and was nothing so took socket out checked at connections and nothing. I have seen somewhere it is a fuse in fuse box in boot but have not been able to test as have no fuse box cover and anything found online is no help 

Hi Dave, you have a fusebox in the back of your Focus Estate ?

The rear power socket should be fuse number 39 (20 Amp) in the front passenger footwell

Yes I do it’s in the left hand side rear quarter panel

Well thats a turn up for the books !!

My Focus estate doesn't have a rear fusebox (now I'm going to have to check).

Looks like there are not too many fuses so I guess the best thing to do is test them all. Start with the 20 Amp and work your way down

I know baffled me too in my hand book there are these fuse 39 is in the engine compartment fuse box 

So it looks like it should be fuse 25 (its an odd - ball fuse type).

I see from the photo of your fusebox that fuse 25 is missing

Thanks for the help it’s much appreciated will have a look in morning about sourcing a fuse 

It is a "J Case" type.

There are 2 diffrent lengths, I think yours will be the short one. Halfords sell them.

Cheers will be going Halfords in morning