[mgm60]

LM44S, I'm dealing with my own Fuel Sending Unit problems and sharing what I've read. If the wire at the Sending unit isn't connected to anything, the gauge should read empty or bottom of scale. If you ground that same wire the gauge should read full or top of scale. If those two are true your gauge is good as is the wire to the Sending Unit. That test worked for me so I know I have a good gauge but can't get anywhere near an accurate measurement with the aftermarket unit.