The real question is what caused the fuse to blow... They don't usually just go bad.

Well, that is an excellent question. I talked it over with my wife as I usually do when I typically wake up every morning between 3 and 4am. I can't wait for her to get up on her own to share my thoughts so around 6am I turn the fan off, leave the bathroom door and light on, snuggle up to her and let her know what I have been doing since 3am. She might not be the best listener, and quite honest she tends to come off a bit grumpy, but I do get to explain what I am going thru. I had just switched all my electronics from my 20' Ranger, including switching the lithium batteries and when I switched the batteries, I touched the connectors together with a wrench that caused a heck of a spark. I'm thinking, and my half-asleep grumpy wife tends to agree that was probably what blew the fuse. She is so happy for me to finally be ready to be on the water before she wakes up. I know she gonna miss those early morning talks but hey what can you do.

I believe you figured it out