If you have a RHD version, the fuse is under a panel just in front of your knees. Can't remember amperage (10 or 20?). In our local car shop (Halfords in the UK) these fuses are sold as audio fuses and do not appear in the section for car fuses, but in the audio section. Confusing. In any event, there were never any in stock so I got a pack of them from Maplin (another UK shop).
If you've never changed a fuse, there is a little fuse puller gadget in the fuse box, use this to remove the suspect fuse (there's a "map" of the fuses in the fusebox) and see if the fuse wire is broken by looking through the translucent plastic fuse body.
Apologies if you know all this, but it's better to give too much info. rather than not enough.
Good luck. Roger.