Charging Issue

Single post by the way.
So you have some sort of Chrysler built vehicle with a grounded brush alternator. So we can guess its a pre-1970.
Is this correct?
See here for what is a grounded brush alternator: Identifying Chrysler Alternators (1960-1976)

However now it won't charge
I'm going to just assume nothing at the point, so my apologies for the questions.
When the engine is running what does needle on the gage labled 'alternator' do?
does it change between idle and say fast idle?

and if you know from using your multimeter:
What does the voltage across the battery read with the engine running?
What is the voltage at the alternator output terminal (the stud) ?



I'm getting battery voltage at the alternator with key off.
It should always be the same, key on, key off, engine running, engine not running. Both of those wires (battery positive and alternator output) are welded together under the dash.

Key on i'm getting .10 on the field.
Also .10 at the regulator.
Not sure what you are measuring here. volts to ground?
If the ignition side of the regulator is not getting power with the key on (should show same voltage as battery) then there is a bad connection between the regulator ignition terminal and the key switch. This is assuming there is a good connection to the key switch from the battery and the alternator.