Suzuki: 1986 suzuki alternator # 14824, residual magnetism, volt output


Question
I am using the alternator on my aircraft. and have the 12 volt exciter wire connected to right pin only per the 3 pin dwg. on alternator cap. I get no 12 volt output. So had the alternator tested at 2 autoparts stores and it past at each
store. Please tell me if the other 2 pins need to be connected to ground, voltage, etc. The stores had no clue.

Answer
The exciter wire has to get voltage(usually fed through the filament of the warning bulb) I don't have a wiring diagram immediately at hand, and can't answer your question about the other wires, sorry.
Have you tried introducing voltage(using a test light to the other terminals while the alternator is spinning?  I wonder if the voltage source on your aircraft is actually supplying sufficient power to excite the alternator.  Also, be aware that in many cases the alternator has to achieve a minimum rpm before excitation results in charging, and external excitation is then no longer necessary.  For instance use of an LED source has been proven inadequate to get an alternator excited and charging, inless there is some residual magnetism present.  If the alternator has tested ok, then it's ok.  The problem must lie elsewhere.  If the parts store excites using the terminal, I would conclude that the source on your aircraft is less than optimal.
scotty