Quote:
Originally Posted by Al Schober
Those single wire alternators are pretty simple. Connect them to the battery, spin them, they make current. So first questions is: what voltage do you measure at the alternator output? If same as the battery, the alternator isn't doing it's thing.
If you're confident in your abilities, you can dig into it yourself. Recommend you take it to an alternator shop and have it checked. The internal regulator may be fried.
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I tested the alternator using the following method:
-Tested battery voltage before starting engine. (12.87 volts)
-Started Engine
-Throttle to 1000 RPM
-Re Tested battery voltage at both battery terminal and on Alternator (12.87 volts)
-After running for 30 minutes tested voltage (12.47 volts at both battery and alternator)
Pulled the alternator and took it to auto zone. They put it on their machine and got a fail. I have a new alternator and want to make sure I don't damage it when installing. I cannot get any info on the actual voltage that should flow from the Exciter Wire to the positive coil?