12v power socket not working

[m4t_lee]

Hi all,

Plugged the sat nav in today and the light came on then went off again (I think)
Now the socket doesn't power anything I plug in. The devices charge in another car, the socket lights up and I've taken a look at the fuses and I can't see a blown on, fuse 24 I think.

Does anyone have any ideas please?

Mat