1968 Dart gauge help

John Stapleton said

Thanks for all the answers you guys! I did wonder about your about answer#5 67Dart273.
I did try to loosen the 3/8 top nut holding the red wire and it wanted to spin and was somewhat loose/wobbly.I had to use 2 wrenches to back off the top nut. Could that be the issue? A possible broken internal stud! Also, where are the insulating washers supposed to be?

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You wont find isolating washers on every assembly. Some have the amp gauge poked through metal housing alone. Isolator/fiber washers would be req'd there. Most have amp gauge trough circuit board that has all copper removed in that area so the board material serves as isolator. The gauge itself should have small shoulders cast around the studs which locates them away from metal housing there.
Regardless of all that, If any gauge has loose wobbling/turning studs, the gauge is broken. Use a 10-24 nut and bolt to put the 2 ring terminals together off the gauge. Tape it up good.