Lotus Elan

Fuel Gauge sender unit

PostPost by: MikeBee » Thu Sep 08, 2016 4:17 pm

Hi,
I suspect that this will be only the first of a long list of questions as I get my 1966 S3 fhc ready for the road.
question: is there any way I can bench test the fuel gauge sender unit before installing it and maybe having to pull it all out again?

appreciate any help.

thanks.

Mike
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PostPost by: ericbushby » Thu Sep 08, 2016 5:20 pm

Yes,
It is only a variable resistor.
There are two types. One should read form zero to 90 ohms as you move the arm from one end to the other.
The later type is 20 ohms to 230 ohms
I expect your car to have the 90 ohm version but it may have been changed.
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PostPost by: MikeBee » Thu Sep 22, 2016 11:57 am

Eric,
many thanks, I'll try and have a go this weekend.

Regards

Mike
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PostPost by: stugilmour » Fri Sep 23, 2016 12:14 am

Mike, don't forget to use a 10v supply during your test. It is fed from the voltage stabilizer, and will read incorrectly if you are bench testing with 12 v supply.

HTH

Stu
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PostPost by: The Veg » Fri Sep 23, 2016 5:05 pm

But wouldn't voltage confuse the ohmmeter?
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PostPost by: john.p.clegg » Fri Sep 23, 2016 5:24 pm

It certainly would.....I suppose Stu is thinking of bench testing the sender against the gauge on the bench.

John :wink:
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