Stumped

zigs said

Right. Been there , done that. Not having problems finding ohms. I'm getting 5v no matter where i touch it on the sending unit. I'm thinking I have a short in the unit itself. I will still get all the correct ohm readings but the voltage isn't making the resistance it needs to operate. In other words ,it works by hand but not by voltage.

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Uh you get 5v to ground on the sender body? That means you don't have a ground path that will carry enough current to run the gauge.

Whatever your ground connection is to the sender body or the chassis ground is, you have a problem. Disconnect the 5v signal, and set your meter to OHMS. Check the resistance to a known good chassis ground through the sender. Next check the resistance from the sender body to the same ground. Should be a fraction of an ohm.

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