Quote:
Originally Posted by funola
To monitor charge current of your alternator, clamp-on ammeter should be on the B+ terminal, not D+. I'd like to see you do that while you drive.
What you want to do is monitor voltage while you drive. It should be pretty steady. If you see a sudden dip in voltage, pull over and investigate with your ammeter.
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B1 correct. By my 6th day of work and three young children pulling at my ankles, my mind begins to shut down.
If you measure current on D+ you will measure 500ma approx(stator field diodes) and this will disapear once the alternator is spinning. If you measure B+ you will get the output from the power diodes.
It would be nice if car manufactures kept this method in cars. I have two old English cars that both have an ammeter on the dash as oppose to an idiot light 'battery light'. It's so simple, you rev the engine the needle moves.