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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

tip for fuel gauge not working :-)

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Old Mar 27, 2012 | 01:15 PM
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tip for fuel gauge not working :-)

learnt the hard way if your fuel gauge doesn't read anything and you no longer have the auxiliray tank, flick the switch on the dash!!!! mine's been OS for a couple of weeks & was tracing the wire in case I needed to change the wire & add an inline fuse, followed the wire & found a spur to the switch, that's when I had a "DOH" moment, gauge now works fine laughed for 5 mins......
 
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Old Mar 27, 2012 | 02:16 PM
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lol sometime it's just to simple to fix
 
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Old Mar 27, 2012 | 02:48 PM
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did feel a bit of a chump at least it's one I can cross off the to do list. mostly rust repair but not too much, the worst bit is top of bulkhead around wiper arm mount, real pig to get to.
 
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Old Mar 27, 2012 | 04:05 PM
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what if you dont have a switch on the dash? i have a switch on the floor next to my seat.
 
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Old Mar 27, 2012 | 10:54 PM
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drizzie27: The floor switch is to physically switch which tank is getting drained. The switch under the dash is for the gauge (to show what's in a particular tank, but not necessarily indicate which tank is the active tank).
Clear like mud, right?????

72RichB: I feel your pain, man...
 
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Old Mar 27, 2012 | 11:23 PM
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I've looked everywhere on my 71 250 and can't find a switch anywhere. I even took my cluster out too
 
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Old Mar 27, 2012 | 11:43 PM
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Originally Posted by drizzie27
I've looked everywhere on my 71 250 and can't find a switch anywhere. I even took my cluster out too
I'm working from the 1967 wiring diagram manual, so hopefully it's the same for 71... Off the back of your cluster from the fuel gauge there should be a couple wires. One should be Orange, the other Black-Green stripe. According to my diagram, if you follow the orange wire, it should take you to the switch (if you have one).
Hope that helps...
 
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Old Mar 28, 2012 | 08:03 AM
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Drizzie, I saw your other post about the wires being cut. The second picture you showed goes to your gauge and the orange wire should go to either a selector switch or straight to the sending unit on your tank. So as of right now you may not have a wire hooked to your sending unit which would explain why it's not working
 
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Old Mar 28, 2012 | 08:53 AM
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Your talking about the two red wires going down to one wire? Right
 
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Old Mar 28, 2012 | 10:36 AM
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yeah, well in the picture they look green. but either way, the one with the orange wire coming out of the connector.
 
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Old Mar 28, 2012 | 10:46 AM
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My bad they are two green/yellow wires down to one red wire
 
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Old Mar 28, 2012 | 10:56 AM
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yeah, that should run to your sending unit, my old wire ran above the door, but i ran a new one since i relocated the tank. you should be able to find the wire and trace it back to the tank.
 
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Old Mar 28, 2012 | 11:24 AM
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Originally Posted by 68Ford4Life
yeah, that should run to your sending unit, my old wire ran above the door, but i ran a new one since i relocated the tank. you should be able to find the wire and trace it back to the tank.
so if thats the case, where is that wire supposed to be connected to? is it supposed to have a 90degree boot that slids on the back of a bolt like the cig lighter wire?
 
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Old Mar 28, 2012 | 11:30 AM
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no it will hook to a post sticking off the sending unit on the top of your gas tank. you can use an eye connector and use a nut to pull it tight.
 
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Old Mar 28, 2012 | 12:04 PM
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it has wiring on it already and its connected to the harness that connects to the back of the guages.


sorry for thread jacking Rich.
 
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