Ford Truck Enthusiasts Forums - View Single Post - Fuel gauge reading tank as full.
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Old 08-16-2014, 08:47 PM
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Originally Posted by mikeo0o0o0 View Post
You'll have to troubleshoot it to find out why.
Unplug the sending unit and turn the ignition to "on". Does the gauge stay on "E" or does it still swing over to full? If it goes to full then either there's a problem in the wiring or the gauge is bad. If it now stays on "E" then probably a bad sending unit.
I unplugged the sending unit. It now stays on E. I picked up a sending unit at the pull and pay. When I have some time, I will put that one in and see what happens. Thanks guys for the suggestions.

What's the best way to test the sending unit I picked up, and also to test the one that's already in there to see if it is indeed bad?
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