22-05-2021, 06:15 PM
Hi Nick
It sounds to me as though the cutout isn't opening, allowing current to feed back into the dynamo. This needs to be sorted out before any other investigations.
You could prove a point by sliding a very thin piece of insulation between the cutout contacts to make 100% sure of no conducting path. If you still see a heavy discharge when you turn on the ignition with the engine stationary, that would point to a wiring fault.
It sounds to me as though the cutout isn't opening, allowing current to feed back into the dynamo. This needs to be sorted out before any other investigations.
You could prove a point by sliding a very thin piece of insulation between the cutout contacts to make 100% sure of no conducting path. If you still see a heavy discharge when you turn on the ignition with the engine stationary, that would point to a wiring fault.