Battery draining fast

Okay, you have 12 volts on the blue wire going to the regulator. Please do the connecting the field terminal on the back of the alternator to the alternator output stud test mentioned in my post above. This will tell us if the alternator is good and if the charging circuit path is intact.

Also, the poor battery is taking a beating by not being charged yet still being called upon to start the car. Get yourself a small 4 to 6 amp charger to keep the battery up.

With the green field wire connected and the engine running, measure the voltage from the Green field wire at the regulator to ground with your voltmeter. What is that voltage?