91 SSE radio problem

My 91 SSE radio quit. This has been giving me trouble for over a year. It would quit and I could pull the radio fuse and put it back in.The radio would than come back on and work for weeks till it did it again.The last time it quit pulling the fuse didn't fix it. I beleive the fuse # is 11 and the chime is on the same circut. The fuse is good. Is there another fuse in the circut for the radio? Thanks for any comments.