Fuel guage and sender wiring

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ibreadmore
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Fuel guage and sender wiring

Post by ibreadmore » Thu Sep 11, 2014 9:13 am

I have:

Smiths BF2232/00 fuel gauge
Smiths FT3331/56 level sender

Tried wiring them up last night and hit a snag.

Gauge reads perfect on full but reduce the level sender to empty and the gauge doesn't move past half full. Are the two items compatible?

Anyone got any advice?
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Re: Fuel guage and sender wiring

Post by ibreadmore » Thu Sep 11, 2014 9:51 am

May have answered my own query. :roll:

Just remembered that i got a new tank, the old one is under my deck and may contain a different sender unit that matches the gauge.
If you see the tree you are driving into, you have understeered. If you only hear it, you have oversteered....

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Sales Executive at Rotorua Hyundai - Come see me for your new car - (07) 348 2494

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Re: Fuel guage and sender wiring

Post by ibreadmore » Thu Sep 11, 2014 11:36 am

might need to calibrate

http://www.mgb-stuff.org.uk/fuel.htm
If you see the tree you are driving into, you have understeered. If you only hear it, you have oversteered....

1985 Chevron Classic - 1256cc Chevette engine
Sales Executive at Rotorua Hyundai - Come see me for your new car - (07) 348 2494

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Re: Fuel guage and sender wiring

Post by ibreadmore » Thu Sep 11, 2014 8:28 pm

Got the other sender from the old tank. This one is a FT5301/11.

Only has a single spade terminal connection. Must earth through the tank.

Image

No matter what I tried I can't get it to work correctly. Reads full when empty and vice versa.

Any suggestions.


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If you see the tree you are driving into, you have understeered. If you only hear it, you have oversteered....

1985 Chevron Classic - 1256cc Chevette engine
Sales Executive at Rotorua Hyundai - Come see me for your new car - (07) 348 2494

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Re: Fuel guage and sender wiring

Post by Rookie » Thu Sep 11, 2014 10:54 pm

You best bet is to buy a POT for 50 cents from jaycar and find out what resistances you guage needs to work, and then finding a sender that works.
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Re: Fuel guage and sender wiring

Post by ibreadmore » Fri Sep 12, 2014 8:51 am

POT?
If you see the tree you are driving into, you have understeered. If you only hear it, you have oversteered....

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Re: Fuel guage and sender wiring

Post by Rookie » Fri Sep 12, 2014 11:30 am

Potentiometer.
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bzrse7en
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Re: Fuel guage and sender wiring

Post by bzrse7en » Fri Sep 12, 2014 1:45 pm

There are two types of smiths guages, bi-metalic and magnetic (has two coils inside guage.
The senders are different and are incompatable. Bi-metalic has been around since the 70s.
Both type guages are calibrate-able.
Have you got a voltage regulator on the guage? This drops volts down to 10v, without it, you might see the symptoms you describe. My build diary has a little bit on smiths guages.

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Re: Fuel guage and sender wiring

Post by jp928 » Mon May 04, 2015 12:52 pm

Bimetallic ? All senders I have ever seen (apart from late capacitance types) are wiped resistance units. Bimetallic is used to sense temperature changes, not fluid levels in my experience.

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Re: Fuel guage and sender wiring

Post by bzrse7en » Mon May 04, 2015 5:12 pm

The gauge is bimetalic, not the sender. I have one here, pulled apart.

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