I bought an MSD digital window switch but I cant find where to get a tach reading. The instructions say its the 10 white wire on the ECM but I cant find the right one. Can anyone help point me in the right direction. Thanks

 

There is small numbering on the PCM harness where the wires actually go into it. You have to look very carefully but they are there!! I can't remember if it's the red side or blue side that you need though. Just look into which color you need to go for then look where the wires go into the metal harness that connects to the PCM, and underneath the white plastic protector cover, it should be numbered on the metal side of the harness. hope that makes sense... good luck

 

I'll look tommorow thanks

 

red side IIRC