4020 Fuel Gauge question

dflansy

Member
On my 4020 diesel I was looking around and the fuel gauge didn"t work so i wiggled some wires nothing and then I took the wire off of the sending unit and the gauge went to full and then I hooked it back up and it went back down to empty and I know it is full of fuel. So is it a bad gauge or a bad sending unit?
Thanks for the help.
 

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