Which fuse is for the horn and radio in a 1988 Chevy Celebrity the cover with chart is missing?

The fuse block itself is labeled as to what each fuse is for, however most fuses do double duty for 2 or more items not listed on the block. If you reach up at the back of the block there is a release lever that allows the fuse block to swing down for easier viewing. For those items not marked I often wind up taking out each fuse one at a time and determine which one is blown and replace it. Replace fuses with a fuse of the proper value.

If you have a Chilton manual it has a description of the fuse block in it.