Just use one of the 4 spare pins for output. They are the 4 spots by the map sensor. Pin 3-6 I think.

 

I understand that the pin you use doesn't matter but his writeup is wrong unless of course, i'm wrong.

 

It is 29. I will change it in my writeup. but you can use any spare output on the harness as long as nothign else is using it.

I simply used a multimeter to find connectivity between the two spots, must have miscounted originally.