Chim 500 stopped: Is it the alternator?

[rfein]

Today my 1999 Chim 500 started to show the battery charging light while driving normally. Shortly afterwards, it stopped, obviously without any electrical power. With the help of an external battery, it restarted but could not come up to revs, and would not stay on without the external battery attached.

I suspect it is the alternator? Where else should I look? Can alternators be fixed, or should I go for a new one or an exchange one? It has a Marelli alternator. Are they still being made, and if not, what are the alternatives? What could I exect to pay for a new one?

Any suggestions more than welcome. Thanksa in advance!

[winters]

Check 100amp fuse. Little black box mounted, at least on my car, on a lower central chassis member. Near gearbox if i remember correctly. Sure a search on here will turn up more specific info.

[winters]

Otherwise check maybe loose connectors to all the important bits...