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Anonymous Posted on Jun 02, 2013

1989 silverado gas gauge shows full even when cluster removed from dash.

I have removed cluster from dash and gauge shows full When I move indicator to empty and reinstall it goes to full again. When unit is left setting the gauge moves to 1//4.

1 Answer

Stephen

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  • Chevrolet Master 21,873 Answers
  • Posted on Jun 02, 2013
 Stephen
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The sending unit in the tank provides a ground to the gauge depending on the float level. The gauge can "rest" anywhere if the power and ground circuits are not connected.
You would need to know if the gauge has power and is getting a ground signal from the tank.

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on May 04, 2009

SOURCE: 2002 honda crv fuel gauge moves really slow.

I had the same problem. My battery was going bad. When I replaced it with a new one, the fuel gauge worked fine.

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Kevin Rahme

  • 401 Answers
  • Posted on May 05, 2009

SOURCE: 2004 chevy malibu; gas hand moves from empty to full then back to empty

Hi the gas gauge is erractic
you need to replace the fuel level sensor

Anonymous

  • 7 Answers
  • Posted on Jul 20, 2009

SOURCE: Instrument cluster not showing odometer and

It could be the voltage regulator for your instrument cluster is the problem.

Anonymous

  • 31 Answers
  • Posted on Oct 19, 2009

SOURCE: 1995 Honda Civic fuel gauge stuck onfull.

the fuel level sensor in the gas tank needs to be replaced easy way is a new fuel pump assembly

ZJLimited

ZJ Limited

  • 17989 Answers
  • Posted on Oct 19, 2009

SOURCE: 1995 Honda Civic fuel gauge always shows full.

Well, theres a sending unit/float in the tank that sends a signal thru wires to your instrument cluster's fuel gauge. You should have an auto electric repairperson determine where your problem lies. It's not often the needle's just 'stuck' to where you could dislodge it. More often, it's pegged overfull or underempty-signaling a shorted component upstream of the gauge.

Similar problem and found the solution:
In the back of the gauge, where the 2 coils are located, there are very tiny copper wires which connect all the resistors/diodes. they each travel from within the coil and are soldered to 3 out of the 4 mounting pins. if any of these wires are shorting out or disconnected, the gauge will malfunction.

- take the gauge and flip upside down
- temp gauge has 1 resistor (blue) and 1 diode (copper)
- fuel gauge has 2 resistors, no diodes
- 1 wire should be attached to bottom mounting pin (letter E for EMPTY)
- 1 wire should be attached to pin holding both resistors (half tank)
- 1 wire should be attached to the stand-alone ground pin (no mounting bracket)

Hope that helps!


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the sender unit is attached to the fuel pump in the tank.
it can be repaired but it is costly.the other option is to remove the cluster and make sure that the indicator needle is free to move and is not hanging up from a weak return spring or a warped cluster plate
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