[dgb100]

Thanks Giles, I'll check it out. I was hoping the problem wasn't in the tank itself.

[PetesPonies]

true a sending unit is a variable resistor. When the resistance is low the needle moves towards full. It sounds like your wire has shorted to ground,virtually no resistance, thus the full deflection of the needle.

[superdutybob]

I tend to agree with the diagnosis above IF you drive the car all the time.

When I bought my car it had been sitting for a long time with very little fuel in the tank. The entire sending unit was covered in rust including the resistor board. I couldn't buy a new one so the only option was to take it all apart and thoroughly clean it. It now works perfectly.

[tdavidl]

Originally Posted by PetesPonies

true a sending unit is a variable resistor. When the resistance is low the needle moves towards full. It sounds like your wire has shorted to ground,virtually no resistance, thus the full deflection of the needle.

any idea where the wire runs from the tank to the gauge ? I think my wire may have been damaged when the rear brakes were being worked on and i'm not seeing where the wire goes from the tank to the dash

[Dens71TA]

Originally Posted by tdavidl

any idea where the wire runs from the tank to the gauge ? I think my wire may have been damaged when the rear brakes were being worked on and i'm not seeing where the wire goes from the tank to the dash

Fuel gauge sending wire is part of the trunk harness, rubber grommet through the trunk floor behind the license plate/fuel filler tube and on top of the gas tank. Nowhere near the brakes.