Gas Gauge problem
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Freshman User
Joined: Nov 2007
Posts: 44
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From: Lima Ohio
Gas Gauge problem
I am having a problem with my gas gauge. It was not working at all so I grounded it better and it went up. When I shut the truck off it goes down but it never comes down when the power is engaged.
All the other gauges work fine. I plan to take it out but don,t really know why it is acting up??????????????????
All the other gauges work fine. I plan to take it out but don,t really know why it is acting up??????????????????
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
The gauge is at the grounded end of the circuit. There is a rheostatic contact inside the gauge that allows a certain amount of voltage to flow to ground.
If you have grounded the sending unit, it's going to read full all the time. Chances are if it never read at all, either the float is full of gas or the sending unit is bad.
I'm assuming you still run a 6 volt electrical system.
Later Juls
If you have grounded the sending unit, it's going to read full all the time. Chances are if it never read at all, either the float is full of gas or the sending unit is bad.
I'm assuming you still run a 6 volt electrical system.
Later Juls
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
I'm pretty sure the float has been reproduced.
I know the 01A-9275 fuel sender used 1940/48 on cars has been reproduced.
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Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
I'm more familiar with the aftermarket gauges than the originals so I can't help much. The fact that the gauge needle moves is an indicator that the gauge is probably okay. The problem is likely in the sending unit or the wiring. The 48-52 trucks have rubber insulators under the gas tank that can sometimes interfere with getting a proper ground. You might try temporarily running a ground wire all the way back to the negative side of the battery to be sure you have a proper ground and then see how the gauge reads. I had to run a special ground wire to my sender from a source other than the tank itself...
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
The floats are made from two pices of copper soldered together, solder breaks down, gas seeps in, float slowly settles to the bottom of the tank.
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