Yes, the ground wire is on the LH battery and connected good to the frame.
I pulled all the wires one at a time from the key switch and the light switch. No change. The 2 lights were still on dim.
I pulled all 3 wires from the Generator. The "A1" wire made both lights go out. Other 2 wires made no difference.
"A1" connects to the middle post on the regulator, and also to the "Gen" light and then to the "Gen" connector on the key switch. Again, unhooking all the wires (one at a time) from the key switch had no change on the lights.
Since "A2" and "F" on the generator had no change on the lights, but "A1" did, it appears to me the generator is the problem? Could the ground (Positive from RH battery), be coming through generator to the "A1" terminal on the generator?
On a side note, I ran the tractor up and down the road, came back and turned it off the the lights are now off?