[percy]

Have done a search, but couldn't find exactly what i needed

1988 911 Cabriolet -- chain of events
Slightly slow crank on starting, but spirited 15 minute freeway run
Exit freeway, first traffic lights, rough idle, tacho bounces around 3000 rpm at idle.
Next traffic light, idle all over place, followed by stall. Unable to get engine to crank.
Rolled car onto footpath -- insufficient charge for hazard lights ! (can just hear relay ticking)
Call nice AAA bloke -- Battery shows 8 volts !
He suggests alternator failure, as no warning light appeared on dash panel at any time.
Take car home, stick on trickle charger overnight, starts fine next day. However, this time, intermittent blinky warning light at low rpms
Questions
How to work out whether alternator or regulator has failed ?
Should replacement alternator have integral regulator?
Or can I get a Bosch reman alternator, and pair it with a Marchal regulator (Pelican Parts)
Thanks in advance