Question about 1993 Saab 900
On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); gauge not working.
Test the resistance with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!
Posted on Jul 01, 2009
You Probably need a new fuel pump(comes with fuel sending unit). But you'll want to proof it out before you start buying expensive parts. If you access the fuel pump, remove it and inspect it. You will narrow it down. The float could have fallen off or failed, the sending unit could be damaged (use a multimeter to test), or the wiring or plug to the sending unit could be corroded or broken.
Posted on Jun 18, 2009
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Posted on Jan 02, 2017
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