Alternator/Regulator Test?

I just got my Dauntless V-6 engine running and had the battery charged to start it, however after leaving it running and tweaking it for several minutes I turned it off to try and restart it and for some reason the battery had totally drained and was not recharging while the engine was on. In my 66 Tuxedo park with a Dauntless V-6, currently there is a Motorola 35A alternator. Also a voltage regulator which has been painted over so I cant quite tell what it is. Anyways is there a test I can conduct on my own to see if the alternator is putting out enough amps/voltage and is functioning correctly, same goes to the voltage regulator, I have to find the problem because the battery isnt charging so I can't go anywhere with it without a bettery charger. Thanks for any help, btw the link below also gives some random information that I thought might be usefull?

http://www.earlycj5.com/forums/archive/index.php?t-61.html

 

it could be any one of several things, but here are my thoughts.
A low or only partially charged battery will not receive enough amps to reach fully charged condition in only 10 minutes of engine operation. It would take many, many hours at idle and/or a lot of driving miles to accomplish this.
The fact that you stated the battery "drained" after only a few minutes of operation leads me to believe battery very low,not fully charged, or defective battery.
There are no tests for the regulator, simply replace it if you suspect it.
You can do a few tests on the alt, but a good voltmeter is required.
There are quite a few factory tests to isolate a problem inside the alt, but lets just stick to the basic "is it putting out" test.
"This test excludes the regulator from the alt system, thereby isolating the problem to either the reg or the alt.
Disconnect field and voltage regualtor plug and connect jumper wire from aux term to field term. Start engine and run at idle. If voltage at aux term rises to 15-16 volts now, when it did not with the voltage reg connected, then defect is in regualtor and should be replaced.
If voltage does not rise at aux term, defect is inside alt, stator, etc etc.
If rated current output is obtained with at least 13 volts but less than 15 volts at the output term, the alt is functioning properly."
this info all per the FSM

of course, this info assumes good clean connections, good grounds, and correct wiring to the components.
hth

 

Try the testing indicated above. Or just test the battery voltage, Then start the engine and test it again. If not up to 13-15. Then it is not charging.

Motorola charging systems are notorious for this.

My advice (and many others here):
Junk the motorola, install a delco 10si in it's place. The wiring is reasonably simple.

My $0.02 worth

 

You can perform the voltage and full-field tests described above, but if you still aren't sure what's wrong, bring the alternator into many good auto parts shops, and they will bench test it, usually for free. Call around and ask local parts houses if they have an alternator bench. I would suspect the battery or connections first, next the regulator, and the alternator last. I agree with Fithian62 BTW - Go with the Delco.