Posted by Steve@Advance on May 05, 2021 at 18:32:42 from (99.190.215.237):
In Reply to: Fuel and Temp Guages posted by super99 on May 05, 2021 at 17:43:41:
Have you tried grounding the wire that connects to the sending unit?
Ignition on, ground the wire from the gauge. It should swing to full, return to empty when removed from ground. Some react backward, but it should move when the wire is grounded or removed from ground. That test will verify if the gauge is working. If nothing happens, revisit the gauge wiring, possibly a defective gauge.
If it passes that test, look further into the sending unit. Since it is already out of the tank, connect the gauge wire to the terminal, ground the mount ring. manually operate the float, see if the gauge moves. If it stays on empty, there is an open circuit. A bad connection, defective winding or contact inside the sending unit. Having an ohm meter helps, you should be able to read the resistance and see a change as the float is moved. Check each connection on the sending unit with the ohm meter, you should be able to find exactly what is happening, or not happening.
If this is a gas tractor, be very careful, get everything away from the open tank as possible when testing, all it takes is a spark!
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