Engine Died While Driving

Thanks TB!

Looks like the Fusible Link in my bulkhead connector is fried...

Looking at my service mahul, looks like this ties to my ammeter, which is tied ti the alternator it seems.

Could my alternator be the root cause here?

Well that'd do it. :D
Right now I doubt the alternator is bad.
Most likely your charging went nuts due to the charge not having a solid place to go.
I would start by fixing that Fusible link situation and go from there.
BTW, I ripped that link out of my car the first day I had it, and replaced it with a 30 amp self resetting circuit breaker.
Something designed to burn up under the hood just didn't sit right with me.:D
I have not had one problem with the 30 amp breaker, but some disagree with using them in place of the link.