93 Regal electrical problem

93 Buick Regal Custom w/ 3.8 engine. Power door locks and windows. Last year fuse in box in glove compartment - top middle marked ELEC 15AMP would blow. Only indication something was wrong was radio had no power. Removed chime module and fuse no longer blew. About one year later problem has returned. Fuse blows and radio will not work. When I change fuse will work all day. Next morn when I start car fuse will blow. Have changed fuse and will last a few days then will blow. Any ideas on how to trouble shoot. Could this have something to do with the door latch switches.
Thanks in advance for any help.