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My Own Worst Enemy
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According to the manual it is a single green wire located in the main wiring harness (but I could not find it on my box, base, dai, 16 injector, plus racpak interface options). I may be wrong but I think someone said that the tach wire is only there if it is a box for an ls engine. Check with procrew he will know.
 

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We have a single green wire in the MWH to provide tach signal to the Racepak, using the LS COP strategy like Jeff said above. What ignition are you using that doesn't have an tach output?
 

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Salman, you will hook up the tach wire to your 7531. Either the gray wire or the spade terminal on the side of the unit. Your BS3 does not have a tach output.
 
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Discussion Starter #6
Joe, Thanks for the help. That question for other application, I have BS3 on mod motor and it's a stock ignition also i have aeromotive fuel pump controller and i want to attach the green wire of the controller to tachometer !! The question is there on BS3 output for tachometer ? Thanks again buddy :)
 
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