Where is the fuse for the radio on a 2004 Ford F550 super duty?

The fuse for the radio in a 2004 Ford F550 Super Duty is located in the fuse panel, which is typically found under the dashboard on the driver's side. Specifically, you should check fuse number 16, which is usually designated for the radio and other accessories. If you're having issues with the radio, inspecting this fuse for any signs of damage or a blown connection is a good first step. Always refer to the owner's manual for the exact fuse layout and specifications.