Ya i've tried it with my sat nav and it doesn't work either, iI did look at the fuse box and checked some of them as the drawing on the cover is quite hard to understand. thanks for you're help sunshine....Pat..Are you sure the whole cigarette lighter unit needs to be replaced? Check the fuse if you've plugged something else besides the lighter element itsef and it does not work. That may fix it.
If you've only checked the lighter element, it may be that you just need to replace the lighter element, which you can get (a generic one) at any car parts place.
I learned this lesson paying a mechanic about a 100 euro to fix this (not on a Nissan). There was nothing to fix except get a cheap replacement lighter element!
Best of luck.