Try removing the runtz resistor and leaving it alone for a while. Then, please try connecting your power wire to your fuel gauge without using that resistor. Please trust me, nothing bad will happen if the 12v wire connects to the right side of your fuel gauge (as you look at the back side of it). If the ohms at the sending unit are around 20, things are sounding good there. Assuming the resistance is 20 ohms where the signal wire connects to your gauge (the left hand post as you look at the back side of it), your gauge should show about 2/3 full...since you have 2/3 of 30 ohms of resistance being sent to the gauge (30 ohms would be full). Please let us know.
Last edited by Jon G; 07/20/2023 11:11 PM.