Low fuel warning indicator - Team Camaro Tech
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post #1 of 3 (permalink) Old May 22nd, 11, 02:54 PM Thread Starter
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Low fuel warning indicator

I am installing a console with gauges in a 68. The Speedometer and Tach are not installed yet so I checked the voltage of the yellow wire at the dash harness. The voltage is low, .01 volts. The tan wire (sending unit) is 0 ohms as the tank is empty
The gauges are used and I do not know if they work.
Is it safe to assume the warning unit needs replacing?
Also the fuel gauge needle does not move when igniton is turned on, I realize the tank is empty but does the lack of movement indicate an issue?
The pink(ignition) wire is functioning.The sending unit is new and I did check resistance with float raised and lowered before installing.
Thanks for any reply.
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post #2 of 3 (permalink) Old May 25th, 11, 05:18 PM
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Re: Low fuel warning indicator

The Low Fuel Module is really a kind of switch that comes on when the sender resistance is below a certain value. The warning light in the instrument cluster has power to it (Pink) and is grounded (Yellow) when the module switches "on". So, if you are applying power to the gauge and instrument cluster, the Low Fuel warning light should be on.

Not sure if the gauge should move with Ignition on when completely empty.


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post #3 of 3 (permalink) Old May 25th, 11, 06:54 PM
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Re: Low fuel warning indicator

You could visit an electronics parts store and get a 100 ohm rheostat or variable resistor and solder a length of wire to the center post and one end post and use this test resistor to substitute for the sending unit to check the gauge circuit.

Be sure to attach a lead to a good ground.

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