Well I used a new voltage regulator and the gen light is still on. There was no electrical voltage difference between the new and old other than burnishing of the coils and no way to adjust the voltage. I have been looking at many different wiring diagrams and found a Pontiac diagram (nonspecific) that shows the brown wire going to the ignition switch then pairs off two wires to the Gen light and elsewhere, I will look at it more closely to where it goes.

Back in the 70's I had auto shop at the JC and still had some notes & Echlin tech bulletins from 1972 this is for the Delcotron System.

1. This is what is called the resistor test:

If the system is equipped with a signal lamp remove the connector block from the regulator. Connect a Voltmeter from pin-4 terminal on the connector plug to ground. Turn the ignition switch to the ACC position. The voltage reading should be approximately 12 volts. If there is no voltage reading, the resistor or resistor wire connected to the ACC terminal of the ignition switch is open and must be replaced.

In doing the resistor test my results show the voltage at 10.5volts which is within spec.

2.Signal lamp test :(TO BE DONE TONIGHT)
Connect a jumper wire from pin-4 terminal on the connector plug to the F terminal (first pin). Turn on the ignition switch. If the lamp does not light the bulb may be burned out (it works), or the alternator brushes may be worn (have new Alternator) or sticking in the holders.