72 Chevy C-10 Fuel Sending Unit Problem
I am having the most difficult time understanding the way my fuel gauge / sending unit circuit works. I have original the "behind the seat" gas tank set up.
If I may ask a few questions about the circuit...
OK, I just installed my second sending unit and the results havent changed, so I doubt both sending units were problematic.
When full of gas, my sending units both send a reading of 3/8ths.
When empty of gas, my sending units both send a reading of 1/8th.
When I remove the tan wire, the gauge swings to about 2:30 position (past-full). Check!
When I ground out the tan wire, the gauge swings to below empty. That's good. Check!
The gauge demonstrated full range of motion between 100% open circuit and 100% grounded out. Check!
So, I doubt the new fuel sending unit or the fuel gauge is to blame.
The brass floats are soldered air-tight on the sending units. I checked, no leaks.
Where do I go from here?
Thanks, auminer49r.
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