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1983 380SEL
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470 Posts
Discussion Starter · #1 ·
Hello,

Does anyone know why the fuel sending unit has 3 wires? I'm guessing one is the signal and the other two are (+) and (-)?

Also, does anyone know which is which?

Thanks!
 

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77 240d, 02 Ford F250 V10 (7mpg), 05 GMC Denali (The Baby Hauler), 2000 BMW 323CI (was my Bros car)
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817 Posts
I would have to say you are correct. You can use a meter. :) But I am sure someone on this board knows whats what.
 

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-88 250D, -93 280TE-24 Sportline and -00 E270T CDI
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898 Posts
Brown is ground, the two others are one for the tank gauge and one for the yellow warning light (fuel empty) :)
 

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1983 380SEL
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470 Posts
Discussion Starter · #4 ·
Thanks fellas!

I'll let you know what works!
 

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Registered
1983 380SEL
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470 Posts
Discussion Starter · #5 ·
Blue with black line = signal

Thanks again!
 
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