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Registered
Join Date: Aug 2001
Location: Brighton UK since 11/2012
Posts: 3,170
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944S and S2s use a different wiring harness. You need to look at the wiring down by the ECU and trace the tachometer feed wire as it's part of the engine wire harness that couples up to the body harness. Use the factory wiring diagrams and it's fairly clear. I've done the S2 engine into the S but not the other way round. It is just a case of rewiring one wire.
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From November 2012; Precision Porsche Specialist
Sussex UK, +44 (0)1825-721-205
2001-2012 Gerber Motorsport Inc. 206-352-6911
07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red
08.16.09 1999 Kawasaki ZRX1100. Green.
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