I need some fuel sending unit experts please

bacchustn said
The power probe shows power or ground. When attached to the sending unit connector it alternately flashes ground / power. Alternating but not consistent tempo. I don’t have an analog voltmeter. But the digital showed voltages alternating somewhere between 12 and zero. I can test again with a resistor.

Thanks! You could use that power probe on the oil pressure sending unit wire too.

bacchustn said
Wouldn’t the fuel gauge needle moving toward full during the brief grounding show that the fuel gauge is not burned up?

Yes.
It's the oil pressure gage that might be burned out. Hopefully not. I'm hoping something simple like a terminal not connecting. I know its a pain taking the panel out.

With the panel out, you can check each gage for resistance before testing with power.