Si Alternator Wiring Diagram. 2 terminal is connected to the battery and the base-emitter of transistors TR4 and TR1 is connected to the battery through resistor R5 thus turning these transistors on. 24v system alternator output b terminal to battery positive terminal at full output.
The 12Si Alternator is renown for its reliability and low RPM high current output. With key on power is then transferred through the no charge indicator light to the 1 spade on the alternator regulator connection. Doing it my way ALSO works perfectly well AND the color codes on the wires are still correct--blue wire to 2 on the alternator white sometimes black with white tracer or just plain black--depends on vehicle wire to 1.
This particular model 10SI used in the s and early 80s is the one youll find on the generation of GM cars most often used in demolition derbies.
This setup uses a battery wire ignitionwarning light wire and voltage sensing wire. Install alternator mounting bracket and 2 washers to the CS alternator Measure the resistance in the L wire Connect CS wiring adapter to the CS alternator Connect the heavy battery wire to the BATT terminal on the back of the CS alternator Connect the wiring adapter to the original SI connector Mount the CS alternator. 2 terminal is connected to the battery and the base-emitter of transistors TR4 and TR1 is connected to the battery through resistor R5 thus turning these transistors on. This diagram shows the simple wiring diagram for negative ground Delco SI series alternators The ignition switch is most commonly powered from the starter battery stud but source may vary depending on application.
