2n charging system

on a 3 wire alternator on a 2n which wire from the alternator sends out the current to the rest of the system i am trying to find where the problem is alterator is good but not charging the battery.
RICK
 
The big one on the back, but it won't work without excitation
voltage to terminal #1. Sense voltage goes to #2.
 
got a spare ammeter. go from charge stud on back, thru ammeter to battery.

jump charge stud to #2

jump charge stud to #1 temporarily to test it. if it starts charging.. alt is good
 

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