Quote Originally Posted by rdlangston13 View Post
starter relay? what ever activate the starter solenoid should give you exactly what you are looking for.
Good point. I guess I could trace the wire coming from the ignition switch to try and find the starter relay that way. I just don't want to have to pull the sub box out and there's very little room under the dash unless I do so. Or is it at the starter? I may just leave the SI wire disconnected. Can anyone comment on the importance of having a starter isolation relay in place?

It's puzzling to me though why that post on the ignition switch would show 12V when the transmission is in gear. What purpose does that serve?