Yes.
All of the things can be found if needed. Some will be a bigger PIA than others.
Finish the checks, then you'll know.
So far this is what we know for sure.
At approximately 45 psi, the sender was at 70 ohms.
View attachment 1715733654
And a sender at 70 ohms would cause the gauge to read at near the Low mark. Which it did.
View attachment 1715733655
So the gage is responding properly to the input of the two tests you've conducted, 70 ohms and 0 ohms.
The pressure sender is way off based on the one test you've conducted. It was at 70 ohms when it should have been close to 20 ohms.
Now maybe you can help me out.
When you measured the resistance, was it very steady or did the needle bounce a little?
Video of that here
Oil Pressure Gage and Sending Unit Revisited
