Where do you find the fuse diagram for a 2001 Kia Spectra?

There are two fuses for the audio system. The primary fuse is in the under hood fuse and relay box that is located on the passenger side of the engine compartment towards the rear. That fuse and relay box has a black cover on it that is about 5" x 3".

The fuses are usually shown on the underside of the lid for that box. Your fuse is fuse #9 and it is a 10 amp fuse. There is also a fuse for the audio system in the fuse panel under the steering column.

That fuse panel should have a label on the cover that pulls off. The fuse your looking for there is fuse #8 and it is a 7.5 amp fuse. You don't say why your looking at the fuses.

If the fuses are good, you may want to re-post your question. The Honda radios do have an anti-theft mode that stops the radio from working if the battery goes dead or if the radio loses power. You will usually get at 'code' or 'error' message if that is the case and you'll need to enter the anti-theft code to reactivate the radio.

You may find the code on a white sticker inside the glove box or behind the ash tray. It would be a 5 digit code. If you don't find that, you may find a sticker with about 8-12 letters and numbers on it in either of those locations; that sticker would be the radio serial number and any honda dealer could get you the anti-theft code if you give them the serial number.