How do you wire a ralley tach?

[wyoduster]

I added a tach to my ralley dash in my Duster.This is a mopar tach out of another ralley dash. I have NO IDEA what, where, and how, to wire this up. I need some help on this(what a suprise). :help:

 

[rednesss]

Well on my factory tach on my 68 B'cuda there's only 2 electrical connections. One from switched power 12V, and one from the coil. The ground comes from the chassis. Off the top of my head I think the 12V has a ring terminal and the coil lead is a spade.

 

[wyoduster]

bump