Testing -6 alternator/regulator in car?, Yep I tried searching but maybe I suck at that... Options

[campbellcj]

Hi All -

I'm fairly sure my alternator (-6) just crapped-out and want to confirm that's the problem. Very abruptly my dash voltmeter dropped to around 10-11V when running, regardless of revs, vs the normal 13.8 or whatnot.

The battery did not seem to be charging, but was just about 5 yrs old so I replaced it, however no change in the voltmeter reading. All wiring and grounds look intact, same as before the issue started. The car starts and runs normally with a charged battery.

Is there an easy way to confirm it is or isn't the alternator with the engine still in the car?

Thanks!

[Superhawk996]

You can full field the alternator momentarily - if output on B+ isn’t well above 14v alternator is bad.

http://forums.pelicanparts.com/porsche-911...agram-help.html

See post #12 from spoke
http://www.914world.com/bbs2/index.php?showtopic=64142

The terminals he is referring to are D+ and DF. Per his post - if the schematics and the terminal descriptions doesn’t make sense to you, have FLAPS test it, but as you know, that entails the PITA of removing the alternator 1st to test it.