67dart273's instructions helped me diagnose the overcharging in my '72 Scamp with the voltage drop test; I'd never encountered that issue before so it was very helpful to have the expertise at your beckon call...found out there was a 2V drop between the ignition switch and the battery, which creates the difference sensed by the VR, and leads to the overcharge condition. When I tried to replace the ignition harness, I ran into issues so I just installed an ignition relay--all overcharge problems went away, and system voltage dropped down to about 14V~14.5V IIRC.
