30-05-2019, 09:35 AM
Is it a Mk I or Mk II Ruby? The production change to +ve I believe occurred during 1936, possibly when the Mk II was introduced, I understand that the belief that positive charging of the chassis & bodywork reduced the rate of steel corrosion, many UK-built cars continued with this until the 1960's, I think that the wide use of alternators put paid to +ve.
Unless you have any polarity sensitive equipment, or plan to fit any, such as a sat.nav./phone charger, then it does not matter, so long as you re-polarise the dynamo, always a good idea to do this anyway if you are unsure what it was before, or it has been inactive for an extended period of years.
LED bulbs and electronic ignition modules can all be +ve, no right or wrong on which way you want it to be...!
Unless you have any polarity sensitive equipment, or plan to fit any, such as a sat.nav./phone charger, then it does not matter, so long as you re-polarise the dynamo, always a good idea to do this anyway if you are unsure what it was before, or it has been inactive for an extended period of years.
LED bulbs and electronic ignition modules can all be +ve, no right or wrong on which way you want it to be...!