I have an Autometer fuel guage and matching sender combo.

I wired it up, and then with some help wires got moved etc. during a build. I am sure there was a spark or two if you catch my drift.

It did work initially.

Now it does not.

I am thinking I need a new guage. It has a good ground and a switched power etc.

Guage or sender? Which is most likely screwed up?

Thank you for any help.

ROB

just a thought but the gauges measure resistance. Get a resistor from radioshack that works in the range of your gauge. use that to see if your gauge is reading. This will allow you to narrow down if the sending unit is sending the right information to the guage or not.

Depends if you want to diagnose the problem and replace or repair the bad item or searching for a quick answer.

First check to see if everything is connected correctly. See the link below

Disconnect the wire to the sender it should go one way.

Ground it and it should go the other way.

This will tell you if the gauge is even taking a measurement.

Lets say you have #4714 gauge 0 ohms Empty / 90 ohms Full gauge

Basically when the wire to the sender lead is grounded it should be show empty. When the wire is not touching anything, the gauge should show full. If you can get a 40-50 ohm resistor (should be less than a couple $) the gauge should read about 1/2.

Also, I'm not familiar with Autometer, but some electric gauges are what is known as a "bridge" circuit, as in, Wheatstone Bridge. What this means is that the third leg of the circuit is the gauge FRAME which must be grounded

Most all autometer are three wire

Ground
positive
and sender lead.

http://www.autometer.com/productPDF/1079A.pdf

Make sure everything is connected correctly before replacing things

If you have a ohm meter you can bench test the sending unit too.