I asked for this:
You have not given the Fuel Sender unit output voltage yet,
and you gave me this:
When the fuel is empty, resistance is 3 ohms and when full it's 110 ohms. Hope it made it more clear.
Are you saying you have no clue what the VOLTAGE OUTPUT FROM the fuel sender is and you want me to use OHM'S LAW to calculate it based on what ? Now I have to ask for the FUEL GUAGE OUTPUT VOLTAGE ? How can I apply Ohm's law with ONLY the resistance ? If you told me the VOLTAGE then I suppose I could calculate the resistance. Do you have any way to SEPARATE the FUEL GUAGE from the FUEL SENDER unit and MEASURE the fuel SENDER resistance ? Can you MEASURE the FUEL GUAGE OUTPUT VOLTAGE where it connects to the SENDER unit ?