Posted by JMOR on November 09, 2007 at 05:59:32 from (76.185.68.29):
Bob, you mentioned being alternator repair man in a recent post & sound pretty knowledgeable, so maybe you can answer a long standing question of mine. {Since it isn't going to fix anyone's problem & if smoked, the device can't readily (likely not at all) be fixed any way, if you deem responding a waste of your & other's time, I'll understand.}
The circuit diagram for the internals of the Regulator of the GM 10-SI: analysis would indicate that if the connection to TERM#2 were lost, then TR@ turns off, resulting in TR1 turning on, and the field receives full current, resulting in full alt output to Batt. (as in a VERY dead batt=zero volts). Whereas, such an open Sense line connection actually results in NO output from alternator. I suspect that this circuit representation is incomplete & for illustrative purposes only, but there could be more to it than that? P.S. I have observed this on three different alts. & have not examined this on more, so I can't state that it is universal, but...
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