Thanks for the diagram, that explains it. Of course, not having the wiring diagram, how do you test to see which of the sensors is bad.
When I brigde the wire on the right side, the gage shows half full and empty when not bridged.
When I bridge the left side, it shows 3/4 full and empty when not bridged.
The scavenge pump on the right side seems to work as the car can be driven with less than 3 gallons in the tank.
Is there a test sequence for this?
Help is appreciated.

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Regards

Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750