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harlan shift light

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Old 06-19-2007, 11:17 AM
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Default harlan shift light

hey isnt there a way to just hook the rpm connection on the shift light to the tach on the speedo instead of hooking it up to the pcm? or even under the dash where the ob2 port is
Old 06-20-2007, 05:17 AM
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Not that I'm aware of, just run a wire. Its not that hard, really.

Peace,
Craig.
Old 06-20-2007, 11:01 PM
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dont see any difference because its all connected to the pcm
Old 06-20-2007, 11:19 PM
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noone else
Old 06-20-2007, 11:41 PM
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Stock Tach is run via serial data messages, not from the tach output from the PCM.

Hell, the tach line doesn't even come into the cabin on the LS1 cars.
Old 06-21-2007, 01:01 AM
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ok how about the obII port?
Old 06-21-2007, 01:21 AM
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i think its pin 3 for rpm isnt it
Old 06-21-2007, 07:57 AM
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Originally Posted by SLP4CamaroSS
i think its pin 3 for rpm isnt it
no.

trust me, if it was in the car I'd tell people to connect it there.




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