Do I need to install a fuse on a altenator wire?

IMO Steve, you can just replace 1 wire at a time starting with that wire. What I did was purchase a spool of 10 gauge red wire and a good quality terminal pack, finished off with heat shrink. It would be easier than a fuse, fuse-able link or circuit breaker.

The way the stock wiring is set up, you have the fusible link in the system already. There isn’t a need to install another one or a circuit breaker or fuse.