I have an 81 Spider. When I went to start her before it kicked over all power was lost. Ironically, I was in a Fiat Dealership parking lot.
I recently noticed that the alternator seem to be making noise. Replacing it is on my to do list.
Could there be a short in the alternator?
I checked the battery connections, and the battery is good. ( then locked my keys in the trunk.

Thanks,
Ron