another not charging thread

Ok guys, I've done a little fiddling with the wires the past few days and have come to this hypothesis: the alternator field is not getting enough power because of a voltage drop somewhere in the cabin, showing almost a volt drop at the field terminal.
The ignition switch is getting full power from the battery and is sending it through with little resistance. When I see the drop is when the key is in the run position with a little under 1/2 volt drop, even though nothing is on. No motors, no lights, nothing. (Is this from the ignition parts and is normal?) This drop is more exaggerated when I probe the blue ignition wire splice, which seems to be more affected, around 0.1-0.2 difference. Something worth noting, when I unplug the harness for the climate controls, the drop is lessened by about 0.2 volts. This is the only thing that seems to affect the drop since unplugging the wiper motor doesn't affect it, and the radio is removed.
Also, just to clear it up, the output terminal of the alternator field should be less voltage than input terminal right?