Anybody have an english schematic for the 3B fan wiring? I have brown, red with black trace and red with light blue trace wires on mine. I have a Pacet fan fitted and I'm currently using the brown and red/light blue which seems to be giving two speeds. Fast for when engine gets hot and slow for after run pump, so whats the other wire for?
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1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racer -
There is only one place for wiring info...
Look like the red/blue is for the after run circuit and low speed fan, red/black is high speed fan.
I think the stock fan has a resistor built in on the red/blue connection, looks like a resistor to me in the diagram. There is also an external resistor shown (N47) from the after run circuit which would slow the fan down even more. Then the Red/Black dosent have any resistor in the circuit, hence full speed. I might be wrong but thats how i interpret it.91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express -
Thanks for those, I did look on S2 Central but I could only find them in Norwegian!sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racerComment
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hmm, interesting i get one speed and haven't heard it kick the after-run fan in. Will go check later if i get a mosigpic
1992 3b S2 CoupeComment
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