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Fuel gauge reads exactly half after putting harness back in?

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Got around to getting started with re-installing the cluster and it's surround today, since all of my LED bulbs came in over the weekend, and the torrential rains ended last night. Noticed something odd though....

 

With no power (battery still out of car) my fuel gauge currently reads exactly half even though there is probably only one gallon left in the tank; unplugging at the tank end doesn't affect the needle, and the wiring from tank sending unit to harness plug at the dash checked out good last week. I did mess with the sending unit last week, taking it out of the tank to check the thermistor and try to clean up the potentiometer contacts.

 

Any ideas? Is "half" actually the normal power-off position? If it is, I've never noticed that before... Like I said there is currently no 12 volt power in the car, and the wiring from tank to cluster was tested for continuity.

Have you already Started the Engine?

 

Somehow, the Fuel Gauge wiring seems to work properly only with engine Running.

 

I Bet it will read accurate after you drive the Subie for a while...

 

Kind Regards.

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