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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Today's Featured Article - Tuning-Up Your Tractor: Oil, Oil Filter and Air Breather - by Curtis Von Fange. In the preceding articles we discussed some of the various aspects of doing a comprehensive tune up. Hopefully some light was shed on why we do or don't do certain things pertaining to inspections and order of events when doing a tune up. Perhaps some useful reasons were given for why parts fail and what to do about preventing part failure in the future. All these tips will help us think and reason out a problem in order to make our tune up last and, hopefully, keep us from spending extra mone
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