I have tried 3 brand new alternators and my car is not charging at all. Im measuring it from the alternator positive terminal (and also from the battery). As soon as I turn on the car the voltage starts to drop from 12V. Everything is hooked up right and the belt is not slipping. I have tried~ -Re wiring it -checking the alternator fuse -adding grounds -it has a new battery no luck Im thinking it has to be one of the wires from the alternator pigtail connection, since the alternator is good but is not putting out anything at all. How can I go about following these wires or checking for a short in them or something?