gas gauge

[jimcav]

i checked the voltage at the fuel gauge on one side i get 12 volts and the other side i get 7.8 volt and the guage reads empty the neddle is below the empty mark. i am not sure if it is the gauge or the sending unit. i am thinking it is the gauge.

 

[Dunaruna]

Re: gas gauge

Describe the symptoms in more detail please. Does the needle sway with the sway of the boat? Does it read empty all the time? <br /><br />The sender should have two wires, a ground and a sender wire. Make sure the ground wire is making good contact. Ground out the sender wire - the guage should go to full, if it does, you have a faulty sender. If it doesn't, you have a faulty gauge or sender wire.<br /><br />Aldo

 

[jimcav]

Re: gas gauge

The needle does not move at all it stays empty. If I disconnect the ground wire and touch the hot wire in the center of the sending unit will it make the gauge go to full?

 

[willamettejeff]

Re: gas gauge

You should not be connecting the hot wire (12vdc) to any terminal on the gauge other than the I (ignition) terminal and positive terminal for the light. Otherwise you greatly risk destroying your sender and/or your gauge. On new gauges a warning label is attached to the S (sensor) terminal to warn about this. If connecting the S terminal to ground did not cause your gauge's indicator to go above full then your gauge is defective.