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Shift light install

tjmturbo

By tjmturbo
in 996 TT, 996 TT S, 996 GT2

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tjmturbo Member

tjmturbo

Posted
Posted

Trying to find a tach lead to hook up a shift light. Using a Autometer, Raptor light that has three leads, 12 volt, ground and a tach source. Can't seem to find out where to pick up the lead. Before I go ahead and remove the instrument cluster does any one have a suggestion on where to pick up the tach lead?

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Loren Member

Loren

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On a MY05 Turbo S the easiest place to get it is the Violet/Green wire that goes to the OBD II (diagnostic plug).

Loren,

Is this the same for 01 TT?

Yes, on a MY01 internally it goes to different places but that is the same signal.
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tjmturbo Member

tjmturbo

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On a MY05 Turbo S the easiest place to get it is the Violet/Green wire that goes to the OBD II (diagnostic plug).

Thank you for the info. As you said there is a violet and green wire in the ODB II harness.

Can I get my 12 volt from pin 16 and ground from pin 4 of the ODB II plug or would it be better to use what I think is the telephone plug that I found behind the air controls? If you would use the telephone plug can you identify the 12 volt and ground wires in that plug?

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tjmturbo Member

tjmturbo

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I would use the 12 volts from the telephone plug - the OBD II needs +12 volts for some programming functions.

The telephone connector has been covered here many many times - please do a search.

Got it "THANK A BUNCH"

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  • 11 months later...
kpl Member

kpl

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searching and found this thread...

how about for a '03 4S? since I'll be removing the instrument cluster to mount a shift light can I pick up the signal from the back of the tach? and what color wire would that be? Is there also a good place to tap into an 'ignition on' power source in that same area?

Thanks,

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