I have the same question. All I want to do is hook up a CS130 3 wire alternator without a light in the factory circuit. I will use what ever I need to excite.... arouse ...envigorate or whatever the damn alternator, Seems someone should be able to define this task clearly and precisely.
The archive section (Wes Van ) published a large note on this very topic and it helps a lot. Even Wes says someplace the CS and the Si are the same as far as connections for the exciter circuit /arousal light whate ever it is. So I guess that would be all you need to read. Wess shows how to bypass the regualtor on the rad support and everything. Seems like a freakin piece of cake. The document should be required reading for anyone trying this upgrade. I THINK it covers everything that is needed but every time I read one of these posts I get a little twitch in my gut that possibly just possibly I have missed something.
The trouble with electronics is that there can be more than one way to skin a cat (wire a CS130) that is why I did not enrole in electrical engineering and chose mechanical instead. At leaset with mechanical devices ya can see the device / mechanism. With electronics sometimes all ya see, if you are lucky, is a puff of smoke. Sometimes nothing is seen but but components are none the less fried.
Guys I recommend reading Wes Van's article very carefully at least once. Look at the MAD Electronics site also...www.madelectronics.com
they have a bunch of diagrams and tech papers about the circuits on these cars. Again VERY VERY helpful. Not all answers for all folks but give it a try.