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Alright, this doesn't make any sense to me. Are you stating that it takes only 3vDC to initiate the initial excitation of the coils (I'm not talking about the warning relay), or are you saying that the initial excitation voltage experiences a 3vDC drop (so instead of a 12.0v it sees a 9.0v).
Missed that. If you pull the plug off the stk alt and look at the white/black with a meter you'll read batt voltage of approx 12vdc. Now hook it up the alt and backprobe the white/black with key ON. Should read 1-3vdc. The gnd in the alt pulls the voltage down from 12 to approx 1-3 vdc. See ENGINE ELECTRICAL SECTION of the FSM.
A alternator that never causes the warning lights to all come on with key ON engine Off will show 12vdc on the white/black wire with the connector connected to the alt..............proving the alternator is at fault for the lack of all the warning lights coming on under those conditions. So if that was someones case.........he'd just start the engine and see if the white/black when backprobed showed 13-14vdc with engine runing and decide whether or not it's worth fixing or ..........not. I've had this condition and spent the 25 bucks for another regulator and soldered it in to fix this minor problem.
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