Fuel gage question

[j_boucher]

Started truck today noticed the fuel gage was reading past the Empty mark, I know it has fuel as I filled it before I park it last . When turning one the main switch the gauge seems to be grounded as the level moves slightly to empty . Amy one ever seen this ? Maybe my sending unit is stuck . Was going to take it out for a ride tomorrow after I put starting wheel back on , hesitant to put it back on if I need to take dash apart and troubleshoot

 

[j_boucher]

Also all other gages work fine

 

[Ronmar]

What happens if you unplug the sender on top of the tank?

 

[Ronmar]

While you have it unplugged, measure the resistance of the sender...

 

[j_boucher]

I will check it in am it got dark here , I saw it was
Working the other day, who knows lol , seems they always want us to chase a bug , only thing I did different was raised the cab today and swapped out the cab suspension bags with a pair of the upgraded type

 

[j_boucher]

I checked and nothing changes with the gauge When un plugged , I’m going to check resistance in am

 

[j_boucher]

I checked the resistance in the sender and all I get is OL nothing changes /


I fixed it..... I suspected the float was stuck so I removed the Phillips screws and pulled it up checked the resistance and it was present, I re-installed the sender / connected the plug, and now it is reading again

 

[Ronmar]

Excellent! Thats how its done…

 

[ckouba]

FYI - Had a similar issue but... It ended up being one of the wires had backed out of the Packard connector when I was swapping out a sending unit. Check that connector's integrity if the issue re-surfaces.