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Message: <blockquote data-quote="NCDiesel" data-source="post: 103363" data-attributes="member: 14546"><p>To test it, I disconnected the harness from the alternator. To prevent drain I am removing the the battery ground. The reason i think it's the "exciter" circuit and I don't think it's the diode is because it's such a small draw - about 200-250 milliamperes. But enough to drain it in a few/several days. If it was the diode it would probably be a few amps and drain overnight, don't you think? The drain definitely goes away when I disconnect the alternator but it's a harness type plug and so I don't know which of the wires solved it. If it wasn't such a pain to get to I would test by disconnecting the main B+ post on the alternator or use the diode test setting on my multi-meter. I could get a battery disconnect switch from Harbor Freight, but I forget to disconnect the cable often enough as it is, I imagine I would forget to turn the knob on the disconnect too <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>