reversal of battery terminals ie make positive earth instead of -ve?

Answer 1

If you reversed the battery terminals, yes the positive would be considered earth ground in all technical aspects.
The 12 volt system in a vehicle is not designed to work that way though. If you reverse the battery terminals you will fry every computer and module in the vehicle.

Answer 2

Back when cars had dynamo for electrics and only lights and ignition you could do this in order to fit a radio with the "wrong" polarity. Now everything is transistorised, and any attempt to reverse the polarity will blow the lot. Try it, but expect a bill of at least £2,000 just for the new parts

Answer 3

hi there, the only way you can fit radio with pos earth to car with neg earth is to isolate it rubber mount the radio so that none of the metal of radio touches car metal. aerial has to be one that does not fit to car metal say the ones you can fit on your window if you do it that way then you can run supply wires straight from battery it is a tricky op and time consuming but can be done with care jock

Answer 4

No point in me saying
anything, the radio installer
said it all..
many years ago cars were
positive earth, but not now.

Answer 5

you cant do this with a modern engine.as you would blow all electrics. ive a 50s rover and this can be done.as it has a dynamo and +ve -ve swich on the radio and no modern gizmos ....

Answer 6

Your radio will not work unless it was made over 30 years ago.

Answer 7

Bad idea.