The 10SI alternator that most everybody uses has two blade terminals on the outer perimeter of the housing and one large terminal at the back where the main charging wire attaches. The two small blade terminals are on the onboard regulator, and one of them needs to be connected to the charging output to monitor the voltage. Some (not all) regulators will self-energize from the internal circuitry of the alternator without the external reference lead connected, but it usually requires the engine RPM to be goosed after starting to begin the charging process. To make a 10SI charge at idle speed without the initial speedup, connect a short jumper wire from the main charging terminal to the blade terminal marked "2" on the perimeter of the alternator housing. The #1 terminal grounds an idiot light if you choose to use one.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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