They are all 12v. At least it says so in my owners manual and service manual that covers them all /forums/images/graemlins/laugh.gif
There's a whole alphabet soup of tractor models across the years and manufacturers... Figured I'd ask just to make sure. It's kinda like a Farmll-B back in the 40's when JD had a "B" too... Both could be had NFE or WFE too /forums/images/graemlins/grin.gif