To All, I just bought a 48 8n Ford that has been convereted to 12 volts. Got it form a kid who inherited it and doesn't know anything about it, so he is no help. Got it home, fired it up and put it to work pulling stuff out of the woods. It ran for about 15 min. then just shut off. I checked, no spark from the coil. After waiting 20 min it started up, and drove it to the barn and replaced the coil. Gave it a complete tune up and was going to charge the battery and saw that the positive was going to ground. With all that said, I thought that when you change to 12 volts, you go to a negitive ground. I called the kid I got it from and he said he may have hooked the battery up backwards, so now I am really confused. I don't know if he hooed it up backwards or if it's correct. I have not switched it and it starts and runs fine. Any words of wisdom.