[ray_mcavoy]

You're welcome. I don't quite understand what different reading you're talking about though.

In the first pic, it appears as though you have the black meter probe touching the metal case of the sending unit and the red probe touching the connection on the sending unit's variable resistor assembly. Measuring at that point should give you the same 0 to 30Ω reading as you'd expect to see with the red meter probe touching the terminal stud on the top of the sending unit assembly.

Edit: After re-reading your original post, I'm wondering of you're asking about continuity between the sending unit's variable resistor assembly and the terminal stud on top ... if so, yes, you should have continuity between those two points. If that connection were open circuit, you wouldn't see the 0 - 30Ω reading when measuring to the terminal stud and it would explain the gauge reading over-full.