[C2] Fuel gauge bench test.
10-08-2017, 11:37 PM
#1
Fuel gauge bench test.
Were getting ready to drop the body back on the frame this week and I would really like to verify the fuel level sender reads right while it's in the open. Original 66 gauge and new aftermarket sending unit. I wasn't aware that GM ran battery power to the sending unit. I thought I read somewhere about a resistor that is supposed to be on the back of the cluster. Any pictures of that would be helpful, I don't think this one has it. What do I need to hookup with the cluster and sending unit on the bench?
Thanks
Nick
Thanks
Nick
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solidaxel (07-21-2018)
10-09-2017, 06:23 AM
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10-09-2017, 07:27 AM
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Nick
07-20-2018, 10:27 AM
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Melting Slicks
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C2 of Year Finalist (appearance mods) 2019
How to test
I'm bring this thread back up because my fuel gauge doesn't work and there are good diagrams on it. But I still don't see how to test the gauge itself? What would I do to see if its the gauge or the sender? Can I take the wires off the sender and do something to see if the gauge works?
07-20-2018, 10:33 AM
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St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I'm bring this thread back up because my fuel gauge doesn't work and there are good diagrams on it. But I still don't see how to test the gauge itself? What would I do to see if its the gauge or the sender? Can I take the wires off the sender and do something to see if the gauge works?
If this works then the gauge is good, if it fails... isolate the ohms wire at the front to rear connection behind the kick panel and do the same test from there on the ohms wire. If it works, then you have a wire failure between the front to rear connector and the sender, if it fails you probably have a defective dash unit.Willcox
Last edited by Willcox Corvette; 07-20-2018 at 10:34 AM.
07-21-2018, 07:53 AM
#8
Team Owner
The C2 gauge is unique from the other year gauges - it uses a voltage divider.....the sending unit "slider" picks off a voltage that is compared to a baseline voltage - so, this is the only vintage Corvette sending unit that is powered - which makes testing the gauge interesting.....it can be bench tested with a 100 ohm potentiometer. I can't find the article right now but I've posted it before...