Neg or Pos Earth

[oldpom]

Hi

I am checking to see if my 1959 P4 75 would be negative earth or positive earth please. I do not have aceess to the car at the moment to check where the leads go to so any help appreciated

 

[roverp480]

It would have been positive earth when new, and looking at the leads in the picture, the negative is routed through the armoured conduit to the front of the car , it is still probably positive to the frame . I would double check just to make sure there are no modifications outside the scope of the picture.

 

[jp928]

I have seen conversions to neg earth work fine except for one issue - if the coil terminals are marked '-' and '+' they can be polarity sensitive - make sure these connections are correct polarity.

 

[Penguin]

it would of been postive when new, but impossible to say now, in my experience most cars have been converted to negative earth

 

[The Rovering Member]

My 110 was +ve earth & still was when l sold it though may have been changed by the current owner for an alternator.