Cig lighter
 

fuses seem ok the light around it come's on but when i plug my sat-nav in nawt any help guy's?

fuse in the plug that goes into the cig lighter? i.e. disassemble the male bit if possible and check that one's not blown...

also, the fuse for the cig lighter is 20A AFAIR - if you've been prodding around and shorted out the circuit rather than going through the lighter element or other stuff eg sat nav, it might have blown.

I've got my defi's and sat nav of the cig lighter but internally and wondered why everything was dead until I found I'd blown the 20A fuse - can't remember whether it's one of the ones in the footwell or under the bonnet (for newage cas anyway)