[quote=&quot;admin&quot;:rgq0luw1]With an US built Oliver, if it has a generator, then it is positive ground. Some of the imported tractors sold as Oliver might not be, I don't know.

To switch to negative ground, you'd have to re-polarize your generator, switch the wires on the amp gauge, and I think you'd want to switch the wires on the coil. If the juice goes through the coil the wrong way, it will cause the points to fail prematurely.[/quote:rgq0luw1]

Thanks for the info.  I knew about the amp gauge so it would read correctly, and was curious on re-polarizing.  Thats simple tough.  I hadn't thought about the coil.  That's a good tip.