856 delco 10si conversion questions

The picture below shows where the wires go. The switched excitation wire needs a diode, indicator light, or resistor in it if the power is coming from the same switch terminal as the ignition or a fuel shut off solenoid gets power from. Otherwise, back feed from the alternator to the ignition switch could prevent engine shutdown.


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U can buy alternator plug from Amazon with diode in wire.check wire if diode was installed correct.my was backward
 
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