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Old 06-27-2002, 08:30 AM
ctaylor738 ctaylor738 is offline
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Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,315
You have the right idea, but the wiring diagram shows the ground off the sending unit. The guage gets positive and then I think measures voltage from it through the sending unit to ground. At the sending unit, the blue /black comes from the guage and the black/green from the low fuel warning.

The ground is common to both.

I could fax the diagram to you later today. It is all in the Haynes manual.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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