Fairly new to the forum so hello to all and my apologies if this subject does not apply to this forum but I believe it might be better suited here then elsewhere.
I have a John Deere tractor, which uses a fuel sender assy inside the fuel tank. The sender consists of a float, which moves up and down vertically on a potentiometer and some basic components i.e. resistors, diodes etc.
The problem I am having is when the fuel sender unit is mounted in the fuel tank I get no reading on the fuel gauge regardless of how much fuel is in the tank, however if I remove the sender unit and move the float manually it will read from empty to full depending on where I position the float. If I place the sender in a container of water and vary the level of water in the container I will get a reading on the fuel gauge from empty to full depending on the water level. Once I place the sender back into the fuel tank I get no reading at all.
I am hoping someone may have a suggestion as to why the fuel sender appears to work perfectly when I move the float manually and also when it is submerged in a container of water but does not work once installed back in the fuel tank.
Any help would be appreciated as this has baffled me for some time now.
I thank you all
I have a John Deere tractor, which uses a fuel sender assy inside the fuel tank. The sender consists of a float, which moves up and down vertically on a potentiometer and some basic components i.e. resistors, diodes etc.
The problem I am having is when the fuel sender unit is mounted in the fuel tank I get no reading on the fuel gauge regardless of how much fuel is in the tank, however if I remove the sender unit and move the float manually it will read from empty to full depending on where I position the float. If I place the sender in a container of water and vary the level of water in the container I will get a reading on the fuel gauge from empty to full depending on the water level. Once I place the sender back into the fuel tank I get no reading at all.
I am hoping someone may have a suggestion as to why the fuel sender appears to work perfectly when I move the float manually and also when it is submerged in a container of water but does not work once installed back in the fuel tank.
Any help would be appreciated as this has baffled me for some time now.
I thank you all