Found my dads original 1971 duster!

dads71 said

Also, I will try to read through all of the info you gave me and see if I can make any more headway! I just wanted to post an update, in case something popped out at anyone. The pic I took of the original location of the red and black wires on the ammeter are hard to see. I’m wondering if maybe they were on wrong posts? Which posts should each wire be on? I see that one says red, but not sure where black would go

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I'm tempted to let you figure this one out so you will remember it, and understand it!

In terms of function it doesn't matter if they are reversed. The needle will then point toward charge during starting and toward discharge while recharging. The ammeters I've seen on are only stamped with the R for Red.

A few optional items will occassionally be connected at one of the ammeter terminals. Clock, Convertible top motor, rear window defrost grid (along with heavy duty wiring), etc.