Hello guys, This looks to be a good and informative forum. With that said, I have a pretty broad question. A friend of mine has a cat 312 track hoe and he said he has been having problems with the auto throttle system. Well and also it was not shutting off. But I fixed that problem with a new shut off solenoid. And while I fixed the latter problem, that's when he asked me about the auto throttle. I didn't have time to look at it that day. But I said I would later. So, my question is does anyone have a schematic of the wiring for the controller, switches, etc for the system? I was wanting to educate myself before going back out there. Btw, I am an electrician by trade. So I understand wiring etc. But on any equipment, it's a battle sometimes to track down wires and the understanding of how it works normally. Oh and just a bit of info on it. It will run just fine in the manual/back up mode. So I guess the little servo motor and wiring is fine. Any info would be helpful. Thank you in advance.