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Fuel Gauge pegged over full

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Old May 13, 2016 | 08:25 PM
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Canadian7.3's Avatar
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Fuel Gauge pegged over full

Hello everyone, so I just finished buttoning up replacing the rear tank on my truck and filled it up to make sure everything was tight with no leaks.
I noticed that my full gauge is pegged past full. I unclipped the sending unit connector without it changing. I reused everything from the previous tank (as it was all in working order minus the actual tank having a hole) so I am guessing that during re installation the wires for the sending unit were bumped or strained causing a short? If so should I leave the connector unplugged until I have time to re-drop the tank and sort it out?
thanks.
 
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Old May 13, 2016 | 08:48 PM
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Might check fuse #6 in the in cabin fuse panel. I controls the fuel selector switch. If it is blown, the fuel gauge wont work right.
 
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Old May 13, 2016 | 09:11 PM
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fuse #6 is good, front fuel tank reads correctly.
 
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Old May 13, 2016 | 09:51 PM
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Originally Posted by Canadian7.3
fuse #6 is good, front fuel tank reads correctly.
Might sound stupid, but are you sure there's not just a bunch of fuel in the tank?

My gauge stays pegged above full for a solid 30 miles or so if i top it off.
 
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Old May 13, 2016 | 10:02 PM
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If it was only a bit over F then I would not have even raised an eyebrow, but the needle swings as far as it can to the right, I kind of regret not switching to the rear tank with the engine not running before I filled it up to see if the gauge was working correctly. I suppose either way I gotta empty the tank out before I can fix it.
 
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Old May 13, 2016 | 10:43 PM
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Sounds like a short. Make sure you didn't pinched the wires upon reinstall.
 
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Old May 14, 2016 | 05:49 PM
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Check the ground.
 
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