Well, I spoke too soon. I am in the process of trouble shooting my ADS, and while I was under the hood, I decided to take a closer look at the wiring. I pulled off the wire trough cover, and cut away some of the wire wrap tape. I saw cracks in the insulation of one of the wire bundles. This is the bundle that includes wires going to the throttle actuators. A previous owner definitely changed 2 of the 3 bundles, but clearly not this one. I'm really looking forward to this job
. I'll be calling Phil soon. If any of you have tips / pointers, I'd really like to hear them.