I don't have my owners manual and am unable to determine from the diagram on the top of the fuse box which fuse is for the radio. It is a 2003 S-10

The radio and speaker fuses in a 2006 Cadillac DTS are typically located in the fuse box under the hood. To find the exact location of the fuses for the radio and speakers, you can consult the owner's manual for your vehicle, which should have a diagram of the fuse box layout and a list of each fuse and its function.
If you don't have access to the manual, you can try searching online for a diagram of the fuse box layout for your specific make and model. It's also a good idea to check the fuses visually to see if they're blown. A blown fuse will appear visibly damaged, with the metal filament inside the plastic fuse housing being melted or broken.
If you're having trouble locating the fuses or determining if they're blown, you may want to have a mechanic or professional inspect the electrical system for you.

https://owner.ford.com/tools/account/how-tos/owner-manuals.html

You should go to www.reliable-store.com they have got books on every vehicle and also how to service/repair it,

service/repair/owner's/maintenance manual with
parts info, fuse box, gear box, torque specs,coiling, wiring diagrams, electrical diagrams, fuse diagrams, error codes, etc everything

Most fuse box covers have a diagram with fuse lableled so you know what they are full What outback is it I have a manual

have you checked the fuse for the radio inside the fuse box..? look in the owners manual it should tell you which one is for the radio. if you don't have a manual look inside the cover of the fuse box there will be a diagram show in which fuse is for you radio.. I hope this helps

All fuses are labeled in the fuse diagrams in the owner's manual for both fuse boxes, if you don't see the fuse listed then the system in question is not separately fused.

Download owner guide first printing from below link

http://www.motorcraftservice.com/vdirs/SPubs/default.asp?TYPE=OWNERGUIDE&pageid=oghome&gutsid=spubs_serv_all_new&MARKET_LANG=US-EN&YEAR=2003&VEHICLE=Expedition

after downloading go to page number 231 where you get the fuse box diagram
fuse for the radio is #7 in the fuse box diagram

it works completely

For a 2001 Dodge Caravan: The owner's manual is vague, only stating that all fuses are under the hood in the fuse box, no diagrams. Once you have removed the fusebox cover, the diagrams for what each fuse does is provided under the lid. UNCLEARLY marked is the radio fuse, a 20amp fuse located 2nd row from top to the right of the accessory relay. It is marked: RDO/IP IGN.

You can get free owners manuals online at:

http://www.edmunds.com/ownership/howto/articles/120189/article.html

or just type "owners manuals" in your search.

Here is a post I found that worked for my 2005 caravan.

For a 2001 Dodge Caravan: The owner's manual is vague, only stating that all fuses are under the hood in the fuse box, no diagrams. Once you have removed the fusebox cover, the diagrams for what each fuse does is provided under the lid. UNCLEARLY marked is the radio fuse, a 20amp fuse located 2nd row from top to the right of the accessory relay. It is marked: RDO/IP IGN.

Jake

look in the owners manual or on the removable cover to the fuse box under the dash of your car, it should have a guide telling you which one is for the radio. This fuse may also be under the hood in a fuse box there, depending on your model.

If no guide is found there then look in your owners manual and it will guide you were to go.