F1501984

Hello all. I have a 1984 F150 SC one owner, 351HO and C6. Last week my fuel gauge indicator on the rear tank suddenly went to below empty with the tank 3/4 full. Have owned the truck since new and have never had a fuel gauge or switch valve problem before. Front tank still indicates fuel level correctly. Tank valve still seems to be switching between front and rear tanks correctly. Should I be looking for a fuse, unplugged wire ?

Johnboy429bbf

Sounds like a bad connection or ground.

Half ton

Sounds like the sending unit is bad.