To find the correct fuse(s):
1. Consult your owner's manual: This is the best resource. The manual will have a fuse diagram showing the fuse box locations (there's usually one under the hood and one inside the cab) and which fuse(s) are related to the radio.
2. Check the under-hood fuse box: This often contains higher-amperage fuses for major components.
3. Check the fuse box inside the cab: This is usually located under the dashboard, often near the steering column or under a panel.
4. Look for labels: The fuse boxes will have diagrams or labels identifying each fuse. Look for terms like "radio," "audio," "power," or "illumination." Sometimes the fuse isn't directly labeled "radio" but rather relates to a circuit the radio uses.
If you can't find it in the fuse boxes: The problem might not be a blown fuse. It could be a wiring issue, a problem with the radio itself, or a fault in a different part of the electrical system. A qualified mechanic or auto electrician should be consulted in this case.