Cigarett Lighter soes not work on Ford Focus Zetec Mk2 2008 reg?

Just purchased car second hand and realised the front cigarette lighter socket does not work. But thr auxillary socket in storage compartment does.

We have tried changing the fuse, and still nothing, We even went through every fuae in case it had been changed from the manuals fuse diagram and no further forward.

We really need it to.power Sat Nav as I use the auxillery one for medical equipment.

There's nothing stuck inside it, although the insides are slightly tarnished. We have tried a number of items in it just in.case and they all work fine in auxillery socket but not the main one.

Hubby is going mad about it and I have spent every night trying to see what's wrong and getting nowhere. I didn't really want to.go to.dealer to sort it if its something simple.

Anyone have any ideas what coukd be wrong.

You need to check the wiring to the back of the socket, which might require removing some of the interior trim.