Fluctuating fuel gauge

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Gr8bawana

Senior Member
Joined
Dec 7, 2015
Posts
1,281
Reaction score
1,077
Ram Year
2017
Engine
6.7 CTD
My fuel gauge recently started fluctuating when the tank level is anywhere between half a tank and full. Sometimes the gauge will go all the way down to 1/4 tank then back up. Today it dropped all the way to empty and I just filled the tank. Once the tank gets low the gauge seems to stay consistent.
Does the sending unit on the pump have a ground somewhere that I can check? The pump is about 5 years old but the pump itself is working just fine.
Any ideas on where to start checking without dropping the tank? I already checked the connection at the top of the fuel tank.
 
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