Accessory socket fuse is located under the left bin on the dash, if its the honda plug it takes a 3 amp old style glass fuse. It is only designed for phones and i-pods, not compressor and air pumps, wiring is too small for high demand stuff.
I just had this problem and recently posted the fix that applied to my bike.
The socket in the left hand fairing pocket, if that is the one you are referring to, had an in-line 2 amp old style glass fuse in line behind the socket. It is accessed by lifting out the bin. When I blew this fuse, it did not also blow out the 5 amp fuse related to this circuit in the fuse box; which I believe is the purpose of the in-line lower amp fuse.
Some others posted on the thread I started that there are two sockets available from HDL; one with an in-line fuse (like mine) and one not. My tech indicated he had never seen the socket installed on a wing that did not have the in-line fuse, but that doesn't mean it doesn't exist.