My 56 Oldsmobile fuel gauge comes up with eratic readings. Fuel fuel tank, it shows full for a very little while to then drop down to half full or even quarter full. I took it out of the car, put 12 volts on the left contact when you look down on it from the front side. The right contact should give a full reading, when grounded, but the hand just moves a tiny little bid. I get around 90 ohm when measuring the resistance. Any idea what I can do? Is it dead, do I need a replacement? Thanks from Germany for your help.
Make sure your sending unit reads a smooth 90 ohms down to 0 with an ohmmeter. If so, then the gauge is probably the culprit.
Would be nice, if someone could sell me a functioning (!!!) 56 Oldsmobile fuel gauge! I guess that is the best way to get the problem solved...
I'll look in the shop, but yes, it should be a 30 ohm sender. They didn't go to 90 ohms until later, approximately 1964. Also, did you ground the gauge mount plate while performing your bench test?
Whow, I thought that I got a 56 gauge and I read 90 ohms, I already spoke to usapartssupply, the do not have it. The offered me to rebuild it, but it is too expensive to send the core to them from Germany...
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