[dmjlambert]

I'm not clear about what is going on. The picture you show of the multimeter shows it set to the 200 mA range and displaying 2.9, so that is a trivial 2.9 mA. That does not seem consistent with conditions that would cause a test light glowing when hooked up in place of the multimeter. To hook up the multimeter or test light, are you disconnecting a terminal of the battery and connecting the leads to the loose battery cable and the battery post? With key off? Then while monitoring with the light or multimeter that is when you disconnect the plastic terminal from the alternator and notice the change? If it were me I would just unwrap and double check the wiring visually, because it would be rolling around in the back of my mind driving me crazy to not see it. Then I would take the alternator up to the parts store and have them check it.