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You may have a bad sending unit reading incorrectly. Mine reads 1/4 and you are almost empty. I have a 2000 7.3 and have run it out of fuel twice now. I will see if I can get you a wiring diagram soon.
thanks Cammed….the problem started right after I pressure washed the underside. don’t know if it’s related or just coincidence……
Ahh. In that case, maybe you possibly forced some water up into the connection. If you are able to reach it without dropping the tank, you could try removing the connector, and checking for water then adding some dielectric grease. Water in connections can cause corrosion and bad things to happen. I haven’t been under my truck in a while myself so I don’t know if the connector is accessible or not.
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