Packard Forum Index » Post-War (1946-54)

Am presuming the way it is connected with clips in the photo is what you mean when saying works fine out of the tank. Float hanging down reads empty, up reads full. What happens when you put the sender back in the tank? No reading at all, intermittent, incorrect, or goes full scale?

Is it using the original wiring which diagrams show as one continuous length and no inline connectors when back in the tank? Have you tried adding a specific sender ground using a ring terminal under one of the sender mounting screws with the other end connected to a clean spot on the body sheetmetal or frame?

Thanks Howard; With sender in tank the gauge moves about 1/16 inch. The jumper wires are connected to the ground for the sender and the wire to gauge. Have tested ground with continuity tester and run separate wire to dash gauge. My extra NOS sender does the same thing. Also have run separate ground wire to screw that has tooth washer and holds sender to tank. Also all wiring is new.

I would still lean toward something ground related at the tank. Presuming the wire to gauge is intact and didn't somehow get damaged and does not have a bad terminal to wire crimp or connection with a high resistance which if I understand correctly you temporarily replaced with no effect, then the only difference in the two hookups would be the specific ground going directly to the sender you have connected via the clip. The tank making a poor ground connection to the body sheetmetal has been a frequent problem others have experienced once tanks are taken out and replaced or one of the repros installed.

I am one who had tank grounding issues after having the 47 tank cleaned and had to add a separate ground from the sender mounting screw directly to the body.

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Thanks Howard; I think I will run a second ground wire tomorrow and see if anything changes. Dell