The 'I' pin is the alternator sense circuit, voltage supply at all times, and the 'A' pin is alternator monitor.
Couple of helpful articles on wiring:
I have attached the wiring schematics of the charting system as well as the alternator replacement procedure your reference.
Please let me know of any questions.
Images (Click to enlarge)
Wednesday, September 15th, 2021 AT 10:34 PM