Today spend the morning pulling out the sender on my new gas tank I scored ; )
Took out the 5 screws, took my time, cleaned out heads to not strip them.
Then it pulled right out
As I pulled it out it looked to be in good shape. No rust or grime but the arm was totally jammed and not moving. So I opened up the 4 screws to the rheostat and there was the infamous "little wire". Had to be really careful around this thing.
Then proceeded to clean it out and spray some PD Blaster on it. Was going to soak in vinegar for a day but I thought might as well start with the PB. Spent a good 40 minutes cleaning this thing out and the arm started to move. I dropped two drops of oil inside around the moving hinge and this unlocked it. It now swings easily and freely! Cleaned up up inside as best could and let it air/dry out then capped it all back up.
Once I had it cleaned up I did an ohm test to check out functionality
This was my reading for a full tank
And my reading for empty
Then I checked the wires/leads on the truck and got close to 7 volts on there
So went ahead and wired up the sender to do a test. Before I did I checked the gauge with the wires not connected and it pegged at Full. I think this means infinite resistance so the gauge goes all the way to Full
When I wired up the sender this is what I got for empty
And when I adjusted the sender arm to full this is what I got
Not sure why the needle is not moving all the way to full. Wondering if it has to do with only having around 7volts at the sender? It works which is good but I'm trying to think of why 83ohms would not make the needle move all the way to full. Anyone have any ideas?