Ohms readings from sending unit...help

Turn the knob to the right, clockwise, into the black area with white numbers, the upside down "U" is the "omega" symbol, meaning ohms. Set that on "200" This means the meter will measure ACCURATELY up to 200 ohms, and whatever you read in that range will be "direct reading," and depending on how accurate that meter is, it might say 73.0, or 73.5, or just 73, when reading "about" 73 ohms

It does not matter, IN THIS CASE whether black or red leads are interchanged. As above, one goes on the wire connection, the other goes on any of the metal of the mounting flange.

Make SURE you get a good connection