How to test fuel tank sensor

[SnipeJDM]

I pulled the sensor out of my rust fuel tank this afternoon. The sensor sure looks like it has seen better days.

Is there a way to test it out before reinstalling it? I don't want to put it in if it don't work obviously. If I do reinstall it and it doesn't work, can I jump t out somehow?

I understand it's a thermistor, but would like to know if anyone has a way of doing it.

 

[maleko89]

Yes, measure resistance across the terminals and it should be between 700-1100 Ohms.

 

[SnipeJDM]

Should the resistance rise or drop as it heats up? I'll boil some water to test...

 

[maleko89]

Rise. Spec given was at 68°F.

 

[davidon]

I see in the wiring diagram that the diode block is also involved in this circuit. Would a defective diode block cause the sender/sender light not to work? Also the resistance values are for IN fuel?