Riddle me this, Mopar electrical experts.......

The coil does not ground. The coil consists of a primary winding from the neg. coil terminal to the pos coil terminal, and the secondary is connected to the tower and one of the primary terminals, I think the neg. terminal.

So far as your wiring, can you post part of the diagram? Maybe take a screen shot and post it? Only diagrams I have access to are these for 73, and a 72 shop manual

http://www.mymopar.com/downloads/1973/73DartA.jpg

http://www.mymopar.com/downloads/1973/73DartB.jpg

I THINK what you are referring to above is sometimes called (in the shop manuals) as the "no1 splice" I usually call it the "in harness splice." It is taped up in the under-dash harness, you'll have to "feel" back from one of the ammeter wires and the big black going to the IGN switch to find it. THERE ARE a certain number of these that have failed. The NUMBER ONE issue with all these old girls is getting to be corrosion and heat related problems with the bulkhead connector.

READ this great article, which has a simplified illustration of the main charging/ ammeter circuit, and the in-harness splice:

http://www.madelectrical.com/electricaltech/amp-gauges.shtml

from here

http://www.madelectrical.com/electrical-tech.shtml

Be happy to answer more, but I don't have a diagram that matches yours. If yours is digital, (CD) please consider contacting AbodyJoe and consider posting to this thread, where several service manuals can be downloaded

http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=manual,+download