Quote Originally Posted by Ozzie View Post
lol. I've seen raging forum debates on this, but I generally follow the recommendations to remove the ground cable from the battery. Check this reference for um, well, reference:

"...always remove the battery's ground clamp before loosening the positive. If you remove the negative clamp and inadvertently complete a circuit to ground, there will be no current flow because the ground clamp is already grounded. Subsequent shorting of the positive terminal to ground will then produce no current flow because the current has no return path to the negative post. And, of course, always reconnect the ground last."
Reference Link
I'll agree for safety's sake, best to follow the textbook safety instructions, this is what they'll teach in any automechanics school. Don't want to be burned or blow up a battery.

But for electrical theory's sake and posterity, you should get the same amp reading on either side.