i wired up my msd digital window switch and like everyone seems to have done i wired it to my tack signal from the ecu so i have to use the window switch on the 4 setting to get the rpm's close. what color wire do it need to tie the switch into on the coil and is will any coil work so i can use the 1 setting for ls1? i can't find a clear answer searching the web and thought someone could help out. thanks in advance.

 

It needs to be one of the non-common colors on any of the coils.

Thanks,
Garrett