I hooked up my tach wire to the light green wire in the coil pack just like the pics show, but my service engine soon light came on and my window switch will not activate. it is a bmn with first gear lock out. i have also tried it on the #35 wire from the blue pcm connector. please help.

 

I tried the coil packs on my vette too.. didn't work on my msd either.
This might help you (assuming yours is an f-body). Stole if from an earlier post..



If it's a vette, it's still pin 10, white wire, on the red connector only located in the fender well)

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Thanks for the help. I Talked to bryan at HSW and he told me I needed the #35 wire out of the blue connector since I had a '98. Then he asked me if I had the window switch in the 4 cylender mode. I was in the 8 cylender mode, I made the switch and it fixed all of my problems. Lovin' the spray.

 

How do you know if its in 4cylinder mode or 8 cylinder mode??

 

there were instructions with my bmn window switch that told me how to select 4,6, 0r 8 cylender mode.