I checked the BH website - actually downloaded the pdf manual - and don't see the word fuse anywhere.
I believe I have a 2015 bike, as it was a demo unit in an e- bike shop in denver.
I rode leisurely for 10 years on nearby open space trails - wide cinder and concrete trails.
Then I had knee surgery last feb, still cannot pedal a bike due to scar tissue.
I love the bike because I can get outside in the sun and air even though I cannot pedal yet.
Sooner or later I expect the pedaling to happen -
Larry