i have a microedge window switch from harris speed works that is goin on my 1995 z28 and have everything hooked up but cant figure out where to hook up the white wire for the rpms. it says hook up to pin 13 on pcm but i have no idea which one is pin 13 and is that on the computer under the hood on the passenger side? please somone help! pics or advice on where exactly pin 13 is would help tremendously.

 

When I hooked the nitrous on my lt1 I connected to the white wire at the coil

 

You can hook it up that way to the computer the hood. I will try and post you the pin sheet. Im away from my computer at the moment. If not just call chris tom @ nitrousOutlet and he can tell you.