26-04-2021, 04:38 PM
It is probably easier to stick with the original positive earth, so that any future reference to Austin literature willl agree with what you have done. As for flashing the cutout points to polarise the dynamo field, do it if it does not work without doing it, but you will not damage anything by quickly closing and opening the points which will make sure it is right on a 'just in case' basis. There were changing theories about corrosion with negative earth, and positive became the norm until the common use of alternators which has led to negative earth being standard. With a dynamo you can change according to choice, but with an alternator usually having a built in solid state regulator there is no choice but to follow the makers instructions.