Year and model please?

Look at wires to back of alternator.
If heavy red wire, or smaller wire at rear of alternator is torn loose, you can have all those symptoms.

There's a 3rd wire, on rear of alt. close to engine block (that is, at about 8 or 9 o'clock if you're looking at rear face of alternator).

I've had both of those wires come apart on my '86.

Careful of the fat red wire - goes direct to batt. + terminal via the starter solenoid. Big POP if you ground it.