I pulled the install docs for the NOS window switch. The docs say the unit isn't recommended for use on DIS cars. Anyone install one of these on an LS1? If so, where did you pick up the tac signal from?

I may use this WS to test my NOS system, but I'm thinking about ditching this in the near future and getting a digital window switch with integrated WOT sensor. Anyone interested in a window switch and a handful of pills (for the WS )

 

Pin 10 on the PCM which is a white wire is a tach signal. Use a test light on the output wire of the window switch to make sure it is the correct rpm though.