By the way if you are unaware, (and you NEED to nail down the year/ model!!) You can download a 73 factory manual, free, from MyMopar. It is there from a few of us here. There is no 74 manual, if that is what you have, PM me if you want one
The wiring between 72, 73, and 74 (and 75/ 76) are all quite different