TV 12v Socket

Hi

I've been using the 12v  TV socket to charge items using a 2 pin plug to cigarette adaptor. I've always tried to make sure I plugged it in the same way each time in case there was a polarity issue. Anyway either I forgot or something and now it's stopped working. Thought it might be a fuse of some sort but the wiring diagram shows it going back to the MCB and all is well with that so it appears as nothing has tripped.

Any thoughts, are there any other fuses I should check?

Cheers
Bill

Is there a fuse within the cigarette lighter plug? There is in my 2 pin to cigarette plug adaptor.

Thanks, sorted. It was the plug and cigarette adapter socket.
 Cheers