Question about 1993 Volvo 940
Its either a bad ground wire to the sending unit. The sending unit itself. The gauge itself.
If you ground the wire that connects to the sending unit in the tank the gauge should show full. Disconnected the gauge should show empty. this will test the gauge. Most often there is a ground wire going to the sending unit which corrodes.
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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