Originally Posted by FrankSchwab
I'm not sure I agree. I believe that's an electronic sender, and needs to have 12V fed into it to work right; then it simulates the appropriate resistance. I think I'd put it back in-circuit and measure the voltage across the sender as you raise and lower it in the tank - no change, new sender.
That's already a replacement, and not the one that came with the boat.
Would you be able to explain how to test it, either describe it in detail or attach a sketch? I would hate to change it if I didn't need to.
Would you know why in "mtajpa" thread:
the old seader (like mine) does not measure correctly but the new one measures correctly, is it a different style, electronic compaired to mechanical slide?