73 duster - gas gauge not working

Not to put a fly in the ointment, but when I pulled my '75 Duster apart..my connection looked ezactly like the one shown in message #5 and it did not have a ground strap, etc...and I have put it back together the same way.

Could the no ground strap be a change and it being grounded in a different way ?

Just a thought...

Ian.