Ohm's
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Senior User
Joined: Nov 2007
Posts: 494
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From: Guelph
Ohm's
Have checked in the search heading for this but there is no clear answer. I am looking for the ohm's reading for my fuel sender, empty to full on my 52.Mine doesnt seem to work. It reads 7 ohms all the way though its travel. Can I take it apart and clean it? It look like its seal up tight.
Junior User
Joined: Sep 2008
Posts: 90
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From: Whiting, NJ
I don't have a fuel tank sender handy to take a measurement, however I recall this thread...
This was posted 07/22/2009 by bobbytnm in the thread titled
"New gas tank for 48 f-1" :
Type of Sender/Gage Reading Empty (Ohms) Reading Full (Ohms)
Most pre-1965 GM 0 30
Some GM trucks through 1968 0 30
Most 1965 and later GM 0 90
Most pre-1987 Fords and most Mopar 16 158
Ford pre-1987 bi-metallic gauges 10 70
Ford 1987 and later F-series trucks magnetic gauges15 160
Note: Ford Motorsport gauges made by Autometer require the Autometer sending unit # 3262 which operates at 240 ohms empty and 33 ohms full unlike the normal Ford compatible senders as detailed above.
This was posted 07/22/2009 by bobbytnm in the thread titled
"New gas tank for 48 f-1" :
Type of Sender/Gage Reading Empty (Ohms) Reading Full (Ohms)
Most pre-1965 GM 0 30
Some GM trucks through 1968 0 30
Most 1965 and later GM 0 90
Most pre-1987 Fords and most Mopar 16 158
Ford pre-1987 bi-metallic gauges 10 70
Ford 1987 and later F-series trucks magnetic gauges15 160
Note: Ford Motorsport gauges made by Autometer require the Autometer sending unit # 3262 which operates at 240 ohms empty and 33 ohms full unlike the normal Ford compatible senders as detailed above.
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Here is the link to that thread.
https://www.ford-trucks.com/forums/8...-48-f-1-a.html
There's a ton of useful info Bobby posted there - very much worth reading.
If your sending unit is reading a constant resistance, chances are the winding on the rheopstatic slide has broken or not making contact anymore. You can take them apart but honestly that wire is so tiny if it is at all corroded or if you touch it, chances are you will probably break it if it's not broken already.
It sounds like it's time for a new one!
https://www.ford-trucks.com/forums/8...-48-f-1-a.html
There's a ton of useful info Bobby posted there - very much worth reading.
If your sending unit is reading a constant resistance, chances are the winding on the rheopstatic slide has broken or not making contact anymore. You can take them apart but honestly that wire is so tiny if it is at all corroded or if you touch it, chances are you will probably break it if it's not broken already.
It sounds like it's time for a new one!
Roast em' if you got 'em
Joined: Mar 2005
Posts: 22,010
Likes: 9,948
From: Rio Rancho, NM
reg1952,
I've had limited luck cleaning old fuel senders in the past. They aren't real complicated, basically a tiny wire wound multiple times around a chunk of plastic/fiberboard/etc with a small wiper arm attached to the float.
As Jules mentioned the wire is pretty delicate and there's a good chance its corroded beyond repair or the board its wrapped on is toast. If the wires are broken before they ge to the windings you can sometimes repair them, or if the wiper arm isn't making good contact or is a bit corroded you can fix that as well.
Its worth it to take a look, worst case scenario is that you can't do anything with it and have to get another.
Good luck
Bobby
I've had limited luck cleaning old fuel senders in the past. They aren't real complicated, basically a tiny wire wound multiple times around a chunk of plastic/fiberboard/etc with a small wiper arm attached to the float.
As Jules mentioned the wire is pretty delicate and there's a good chance its corroded beyond repair or the board its wrapped on is toast. If the wires are broken before they ge to the windings you can sometimes repair them, or if the wiper arm isn't making good contact or is a bit corroded you can fix that as well.
Its worth it to take a look, worst case scenario is that you can't do anything with it and have to get another.
Good luck
Bobby
