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Old 04-27-2014, 08:31 AM
JB3 JB3 is offline
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Join Date: Jan 2010
Location: RI
Posts: 7,461
Quote:
Originally Posted by Mxfrank View Post
Inside your alternator, there is an extra set of diodes called the "trio". Once the alternator starts, it will generate it's own bootstrap current through the trio to the D+ contact. If you don't have a bulb or resistor of some sort, the trio will be in parallel with the main charging circuit, and will be supplying power to the general electrical system. In time, this will kill the trio, which means you'll need to replace the alternator.
How do you establish what ohm resistance this light bulb or resistor should be?

I did about 8k without this arrangement in my van swap, BUT, the alternator did ultimately have an unrelated problem, the bearings were failing and the shaft was loose. It did charge fine the entire time though.

Because it was reliable i wired it the same for the new alternator and engine, it hasnt been running though, so no additional mileage.

When you say in time, what are we talking about? How long would the damage take to hsppen?
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