1 wire internal or external oem alternator
Mine may have been a regulator only issue with a perfectly fine alternator. I say that because the regulator failed allowing 17 volts to show on my volt gauge. The alternator and regulator were both too hot to touch. I opted to replace both due to the fact surrounding the reason I came to acquire my Duster. It had an electrical fire… under the dash… After hooking up the old alternator and regulator to my $1000 of new harnesses throughout the car with all new interior I was more than happy to change the alternator too after my over voltage discovery. In fact the best upgrade you can make is ammeter bypass and a volt gauge in the car. Had I not done that I would not have caught the issue because first run of 5 minutes it was spot on at 14 volts, shut down and restarted only to notice the volt gauge to be at 17 volts! If checking with a meter on battery I would not have done that test twice in 10 minutes when the mission was setting proper base timing.
I ate the core cost of $10 for the alternator because I shelved mine believing it was good but not knowing its amperage output peak I didn’t trust it. You can get higher amperage output OE alternators for $20 more but the harnesses aren’t rated for it!