I mentioned a good resource for correct tools and supplies in the Fried thread, its on the Civilian Jeep Forum Basic Wiring 101.

P d'ro started this discussion in the other thread, so he's seen that. In his situation, he has no tools or shop, and he needs to minimize on that.
The one the tool that will always be good for P d'ro to have around is a multi-meter.

p d'ro - The keys to the answering your questions are really in your hands now.
You have to identify the wires and where they go and come. Write it down, draw it out, and compare with the factory. Then see what has been changed and how that effects current flow.
Then with both a voltmeter (multimeter) and the ammeter, it will be fairly easy to collect the information that will reveal why ammeter follows the rpm.
See my previous post about what may be wrong and how to figure it out.