[1930 coupe]

If the springs are rusty it will be difficult to operate.
I soak them in evaporust for several days to remove the rust, I then put some light oil in them to make them turn smooth. There is a small spring under the contact that hold the contact against the bulb, if this spring is broken you will need to replace it. The contact must move in and out freely with spring tension. I then replace the wire if necessary.