The 70 / later alternator regulator, from the horses mouth

[67Dart273]

"Read" on

[ame="http://www.youtube.com/watch?v=0AooprchPcw"]1970 Volume 70-4 The 1970 Alternator and Regulator - YouTube[/ame]

 

[bbeep71]

very interesting. most tests were performed at 1250rpm which may explain why output is low at a low idle.

 

[KitCarlson]

Excellent! That was back in the day of component service level. Good tests to do on rebuilt units from parts stores.

The special in circuit diode tester uses a low voltage AC transformer and current measuring circuit. A scope works too.