Question about 1999 Pontiac Sunfire

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Fuel gauge doesn't work 1999 pontiac sunfire - 1999 Pontiac Sunfire

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  • Jonathan S
    Jonathan S May 16, 2010

    Potential problem may be in the wiring or sending unit which is in the gas tank with the fuel pump.Any other issues with other guages or lights being on?



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Check fuses,remove sender unit from tank,connect ohm meter to it and physically move arm up and down slowly and check for increase/decrease in resistance,if this is ok then supply power to the wiring to gauge and see if the needle rises,if no change in resistance sender is rooted,if no change in gauge when it is supplied power then the gauge is rooted,when diagnosing electrical probs always check fuses firstelectrical

Posted on May 16, 2010


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Check your engine coolant.

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SOURCE: gas gauge does not work - 1999 Pontiac Sunfire

One of two problems, your fuel level sending unit is defective, or your gauge Is bad.

Posted on Apr 24, 2010

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Gas gauge does not work - 1999 Pontiac Sunfire

One of two problems, your fuel level sending unit is defective, or your gauge Is bad.

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Hello mcammdf.
To properly test the fuel gauge circuit you will need to check the purple wire at the connector to the fuel tank.
Run a wire from the purple wire at the connector to body ground. If the gauge moves when you ground it the circuit to that point is good.
These cars are noted for fuel gauge problems and most probably the issue will be the sending unit in the fuel tank.


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