Quote Originally Posted by Chev malibu View Post
I must be getting brain farts..are you saying that if I went out and disconnected my negative battery cable from where it is mounted to the frame, and then tapped the frame with it, I would still get an arc? I would have thought that I would have to actually touch a positive wire to accomplish that. I can't see how a circuit would be completed, with a ground to ground contact.

Now on the other hand, if I disconnected my positive cable say from the starter, and then started tapping the frame, or any other grounded point, I know I would get arcing.
Yes! Go ahead and remove the ground connection. Now turn on the headlights then touch the side of the connector to the post and watch for a spark. it'll be there as the current has to flow when the circuit is completed.