Charging problems 67 Barracuda

67Notch - I bought the car "as is" but I know a little about the shaker hood. TEH car actually has a 69 hood and grill assembly - if you look closely in the pic you can see nose ridge. They did this as the 69 hood has bracing underneath that made for a much more rigid structure. As it is they cut 3 hoods to get it right. Images of this car often come up first with a search under 67 Barracuda, which I found out AFTER I bought the car. Oh well only fellow Mopar nuts are looking anyway.

So there are a lot of possible permutations of what's wrong. BillGrissom seems like it would be the easiest fix for me although it's obvious 67dart273 has a wealth of knowledge on what may be wrong. I am not a good mechanic but getting better. Can someone explain how to use an ohmmeter to differentiate between a field terminal and a ground terminal?

Thanks to all who took the time to help me.