I'm building the second VR circuit and need to know which pins on the DB37 theese connect to? I understand that the input to the second vr goes into IAC1A?? and the out puts from the LEDs go to the other 3?? But which goes to which? And once these are wired then what pins on the DB37 would be the inputs/outputs? I also noticed that my DB37 harness has no wire coming out of pin 7 which is supposed to go to Ne- from the CAS.... this is a ground correct? Can I just use any MS ground since I don't have tihs wire? thanks in advance...

 

It doesnt matter which input/output you route to each pin just as you keep it all straight, write it down, and stay consistant.

Most of the time you can visually trace which pins they go to just by following the copper traces. In that picture, from left to right, i believe they go to pins 25,27,29, and 31 in that order. So:
IAC1A => 25
IAC1B => 27
IAC2A => 29
IAC2B => 31

Pin 7 is a sensor ground... basically just a ground but a little more shielded from interferance. If possible i'd run a wire from it to the CAS wire at the harness, because this should result in a cleaner CAS signal. you can find which pin this is on the harness in the FSM, or at least for 2nd gens, its been posted in another thread recent in here.