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I'm starting to tackle an issue with my 69 that has bugged me since getting it on the road in 1997. The fuel gauge has always read incorrectly. It never reads full and never seems to read empty either. For 25 years I've relied on the odometer. First step was to drain the tank and remove the sender unit. Full I'm reading about 5 ohms and empty about 50. If I take apart the sender I can get around 80 at the end of the resistor wire inside. The sender is a 3 wire with the red low fuel wire but my harness has only two pins the green/yellow stripe and yellow. The low fuel warning light isn't something I'm interested in fixing. Any help here would be appreciated!

Paul
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I have a 67, not a 69 but maybe the manual will give you the expected values, or you can dig it up online. You could also connect it to the car and swing it up and down and see what the gauge reads in case the float itself is not floating as it should or is hitting something (give it time to react). Wiggle it a little, too, it may have poor contact with the resistance windings. If all checks out with the sender then I guess that you need to look at the gauge. A nice new fresh one is tempting, but I don't always trust the quality of replacement parts. You are wise to check it out first before just replacing it.
 
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