Fuse

I have a factory fitted sat nav on my Disco 2, 2004 V8, and it might have been good then but pants compared to more modern units. So have purchased a Tom Tom, but as the fitted one turns on with the ignition i won't to stop it by removing the fuse but can seem, to find which one,

Any idea ?

thanks in advance

in a rr the disc unit is in the rear right of boot disconect it there and it shouldnt light up

There isn't a dedicated fuse only for navigation... it's on the auxiliary circuits together with others.

Thanks- Will try that