Alternator not charging

Looking for help! My 74 Dart sat all winter indoors and when started for first time this spring
alt charged for short bit then stopped. I have done the following.
New Alternator since old one was making noise anyway
New regulator
New ballast..4pin
New ground battery cable
Refreshed all grounds to body and engine.
I have the wiring diagram and have found no bad wires yet! I have not yet checked wires as they go through firewall. Anyone know which wires through firewall allow alt to charge?
Main power feed from amp gauge has good connection through firewall.
Read this so you have a good idea how the circuit works.
Understanding Charging Systems with Ammeter

On yours, the blue wire feeds the alternator's field and the green wire controls the connection to ground completing the circuit. So the blue will connect with voltsage regulator and the ignition 'run' side junction on the ballast resistor. This is how the regulator knows the system voltage. It regulates by opening and closing the circuit's connection to ground.