I’ve read and re-read this manual like fifty times and I cannot for the life of me figure out which fuse the radio goes to. I accidentally jumped the car incorrectly and I want to check if the fuse needs to be changed before I take it to a mechanic.

 

Did you do a search threads? This was updated last month and it's in this same subforum, about 5 threads under yours.

where is radio fuse? - Unofficial Honda FIT Forums (fitfreak.net)

 

If power is interrupted (probable during a jump start), then the radio will need to be "reset". Is it possible that that is why you are searching for the radio fuse?

If so, look for "resetting the radio" in your owner's manual. The radio code that you will need should be included with the paperwork.