If it discharges with the lights on and the motor speed above idle, something has gone wrong, no doubt about it. If you still have your old regulator, you could give it a try to see if that is the problem.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!