'92 GMC electrical problem

After about 2 weeks of unuse, suddenly the dome lights, courtesy lights, clock, radio and tape player in my '92 Suburban don't work. The 5 amp radio fuse is OK but the 25 amp fuse for the radio and clock memory keeps bloowing when I replace it. Probably a short has developed somewhere??? Can't imagine how but can anyone give me some help as to where to look for any possible short or perhaps how to rewire them onto another circuit in the fuse block? Heeeellllpppp!!:banghead: