Fuel Gauge Problem

Jan 22, 2007 0 Replies
1986 740 Turbo

Fuel gauge works intermittently, without apparent pattern.



I noted yesterday, while it was functioning, it occasionally would bounce or flicker slightly, over about an eighth of a tank range.



In order to test it via grounding the wire from the instrument panel to the sending unit, I removed the three wire connector near the driver's side trunk hinge (this connector contains the three wires from in tank assembly).



My question: which wire do I ground?



The center gray wire from the tank changes to a white wire to the front: it is in the center.



Is this the one I ground?



Presumably I turn on the key, put a wire in the prong at the connector for the wire, then touch it to body/ground, and make certain the fuel gauge pegs.



thanx



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