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Old 10-13-2010, 08:50 PM   #1
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Tach signal?

Hi Guys,

anyone know of an accessible tach signal wire on the 986?

Regards,
Sam
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Old 10-14-2010, 11:49 AM   #2
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ask jake raby...he has to know. make sure you tell him you have never been a member of PPBB. i can atest to that fact
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Old 10-15-2010, 09:13 AM   #3
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What about the one on the back of the convertible top relay, Pin 18? I am not sure if it is a discreet or analog signal.
You also might be able to use the one on the back of the radio. Can't remember the pin # but I am 90% sure the wire is blue.
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Old 10-15-2010, 05:37 PM   #4
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Are you using an inductive pickup (like on a dyno) or are you probing it? You can take the signal from the coil packs or trace it back to the DME and get it there. I don't know the wire colors on a 986 but you can find it at the coil on one of the cylinders.
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Old 10-15-2010, 05:57 PM   #5
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Pin #18 is a speed signal not a tach signal. It was to keep you from operating the top while moving.
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Old 10-19-2010, 09:14 AM   #6
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Pin#9 on the OBD port. Violet/Green Wire

The pin # changes depending on which year car you have but the wire color doesn't.

You can also find the Violet/Green wire at the DME as well.
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Old 10-19-2010, 03:40 PM   #7
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Brilliant - thank you!!!

Sam
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