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Fuel gauge module
#1362908 Sun May 31 2020 05:19 PM
Joined: Mar 2010
Posts: 143
L
Shop Shark
Has anyone used a fuel gauge module?
To mate up mis matched fuel gauges and sending units,
I’ve been looking at a couple of modules online to match up a mustang sending unit to my 52 Chevy truck fuel gauge.
Thanks


Giving FRED a break
Re: Fuel gauge module
latroca52 #1362922 Sun May 31 2020 08:15 PM
Joined: Mar 2014
Posts: 1,666
J
Shop Shark
I would say the best course of action for you is (a) find out the year Mustang your tank/sending unit came from and (b) find a Mustang gauge or aftermarket gauge made to match with the Mustang sending unit you have. Typically a sending unit will output either 30 ohm (older vehicles and lots of boats) or 90 ohm when the tank is full and 0 ohms when it is empty, but there were some very odd and crazy ones in Mustangs which were just wonky. Some were about 75 ohms empty and 10 ohms full and others were 140 ohms full and something like 20 ohms empty. And if you have a newer Mustang tank, you may have a sender which thinks 160 ohm is full and apx 15 ohms is empty. So there isn't much rhyme or reason involved. But Mustangs were made by Ford, weren't they?

Point I'm making is if you buy a 90 ohm aftermarket gauge and your Mustang sending unit is set up to think 75 ohms is empty and 10 is full, this is going to be backwards. If your Mustang sender thinks 140 ohms is full, then a 90 ohm gauge will never ever register more than about 2/3 full and if that 90 ohm gauge is looking for 0 as the empty point, it will insist you still have fuel when you are bone dry. If you have no idea what year you have, remove the fuel sender unit, get a cheap handheld electronic tester, set it for the right ohm rating and test at full and empty. The nice thing about your 1952 sending unit was it saw 0 ohms as empty and 30 ohms as full. Logical, simple and easy to remember. But if you hire engineers who lack a sense of logic and ask them to design a fuel level system...well, you know where that is going. Good luck. Just make very certain your fuel gauge matches your sender unit or don't leave home without a full 5 gallon gas can or a bicycle in the bed.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Fuel gauge module
latroca52 #1362924 Sun May 31 2020 08:18 PM
Joined: Mar 2014
Posts: 1,666
J
Shop Shark
Oh, sorry...forgot to mention. There is no Mustang sending unit which will work with your 1952 fuel level gauge. As I mentioned that gauge will see empty as 0 ohms. Full will be 30 ohms. If you're really patient and good you can modify a Mustang fuel gauge to fit and work in your 1952 gauge cluster...maybe. The easiest way by far will be to adapt a 0-30 ohm sending unit to the Mustang tank and use the stock gauge.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Fuel gauge module
latroca52 #1362957 Mon Jun 01 2020 12:19 AM
Joined: Mar 2002
Posts: 9,030
Master Gabster
If you bought one of the universal ones that they sell, you could easily remove the sender mechanism. Maybe you could install it in your Mustang unit.


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Re: Fuel gauge module
latroca52 #1362961 Mon Jun 01 2020 12:30 AM
Joined: Jan 2002
Posts: 2,097
C
Shop Shark
Are you running 12v in the truck? If so, why not connect the truck gauge to the Mustang sending unit? Obviously, you might need to tweak the lower arm of the sending unit. I would put exactly 4 gallons (1/4 tank) of fuel in the tank (which I assume is 16 gallons) and see how close to a 1/4 tank mark on the gauge you are. If off, remove and tweak the lower arm of the sending unit accordingly.


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If I'm not working on my truck or VW camper, I'm fishing with the wife or smoking Salmon.
Re: Fuel gauge module
Jon G #1362962 Mon Jun 01 2020 12:31 AM
Joined: Mar 2010
Posts: 143
L
Shop Shark
Originally Posted by Jon G
Oh, sorry...forgot to mention. There is no Mustang sending unit which will work with your 1952 fuel level gauge. As I mentioned that gauge will see empty as 0 ohms. Full will be 30 ohms. If you're really patient and good you can modify a Mustang fuel gauge to fit and work in your 1952 gauge cluster...maybe. The easiest way by far will be to adapt a 0-30 ohm sending unit to the Mustang tank and use the stock gauge.
Ford ohms are all over the place to get the right ohms for the sending unit I have has been a little difficult .I’ve even called the mustang parts store I bought the sender from they don’t know the ohms either it’s 70-73 sending unit.
Thanks for input Jon I think I will order a fuel modular cross my fingers and hope for the best.


Giving FRED a break
Re: Fuel gauge module
latroca52 #1363024 Mon Jun 01 2020 01:16 PM
Joined: Mar 2014
Posts: 1,666
J
Shop Shark
Good luck. Unless you get a gauge which looks for 73 ohms empty and 10 ohms full, it won't work with that sender, I'm afraid. Most if not all aftermarket fuel gauges will only work with the sender made by that company (Bosch, SW, etc).


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Fuel gauge module
latroca52 #1363030 Mon Jun 01 2020 02:31 PM
Joined: Jul 2000
Posts: 1,041
G
Shop Clutterist
Is this what you have ordered?
https://www.tanksinc.com/index.cfm/...=748/category_id=-1/mode=prod/prd748.htm

Very interesting. Please let us know how it works.


Gord
----
1954 1/2 ton 235 4 speed
Re: Fuel gauge module
Gord&Fran #1363059 Mon Jun 01 2020 06:19 PM
Joined: Mar 2010
Posts: 143
L
Shop Shark
Originally Posted by Gord&Fran
Is this what you have ordered?
https://www.tanksinc.com/index.cfm/...=748/category_id=-1/mode=prod/prd748.htm

Very interesting. Please let us know how it works.
No I ordered the one from speedway they have a YouTube video showing the product.


Giving FRED a break

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